diff --git a/README.md b/README.md
index dafdb70..80a908c 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,7 @@ so random website's color scheme works fine for me.
 
 A "standard" poker chip is 39mm wide, and 3.5mm thick.
 
-A "miniature" poker chip is 22m wide, and 3.5mm thick.
+A "miniature" poker chip is 22m wide, and I don't know how thick.
 
 There are boxes you can print that work will with these dimensions.
 
diff --git a/build.sh b/build.sh
index db0c7f9..c7c5db4 100755
--- a/build.sh
+++ b/build.sh
@@ -1,6 +1,26 @@
 #! /bin/sh
 
-cat parameters.json | jq -r ".parameterSets | keys | .[]" \
+if [ ! -f "$1" ]; then
+    cat <<EOD
+Usage: $0 PARAMETERS
+
+Builds everything listed in parameter file PARAMETERS.
+
+Example:
+    $0 mini-hex.json
+EOD
+    return
+fi
+
+run () {
+    echo "=== $*"
+    "$@"
+}
+
+basedir=$(dirname $0)
+
+mkdir -p build
+cat $1 | jq -r ".parameterSets | keys | .[]" \
 | while read param; do
-    openscad -o "${param}.stl" -p parameters.json -P "${param}" chip.scad
-done
\ No newline at end of file
+    run openscad -o "build/chip-${param}.stl" -p "$basedir/$1" -P "${param}" chip.scad
+done
diff --git a/chip.scad b/chip.scad
index a439059..74a457d 100644
--- a/chip.scad
+++ b/chip.scad
@@ -10,8 +10,14 @@ depth = 0.5;
 // Number of sides on your coin
 sides = 6; // [3:360]
 
+// How many holes (spokes) do you want?
+holes = 24; // [0:12]
+
 // Text to display
-TEXT = "100";
+text = "100";
+
+// The font must be installed locally on your system
+font = "Droid Sans:style=Bold";
 
 fontScale = (
     sides == 3 ? 0.50
@@ -34,12 +40,20 @@ module chip() {
             difference() {
                 cube([diameter, diameter, height], center=true);
                 difference() {
-                    cylinder(h=height, d=diameter*0.8-0.0, center=true, $fn=sides);
-                    cylinder(h=height, d=diameter*0.8-2, center=true, $fn=sides);
+                    cylinder(h=height, d=diameter*0.8, center=true, $fn=sides);
+                    cylinder(h=height, d=diameter*0.7, center=true, $fn=sides);
                 }
             }
-            for (i = [0 : 30 : 360]) {
-                rotate(i) cube([diameter*0.8, diameter/8, height*0.7], center=true);
+
+            if (holes == 0) {
+                cube([diameter, diameter, height*0.7], center=true);
+            } else {
+                spokeWidth = (diameter/holes) * 0.8;
+                rotate((sides+holes)%2?90:0) {
+                    for (i = [0 : 360/holes : 360]) {
+                        rotate(i) translate([diameter/2, 0, 0]) cube([diameter, spokeWidth, height*0.7], center=true);
+                    }
+                }
             }
         }
     }
@@ -49,5 +63,5 @@ difference() {
     rotate(rotation) chip();
     translate([0, 0, height/2-depth])
         linear_extrude(height=depth+0.1, convexity = 10, twist = 0)
-            text(text=TEXT, font="Droid Sans:style=Bold", size=fontSize, halign="center", valign="center");
+            text(text=text, font=font, size=fontSize, halign="center", valign="center");
 }
diff --git a/full-circle.json b/full-circle.json
new file mode 100644
index 0000000..75950b4
--- /dev/null
+++ b/full-circle.json
@@ -0,0 +1,95 @@
+{
+    "parameterSets": {
+        "full-circle-1": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 360,
+            "holes": 6,
+            "text": "1"
+        },
+        "full-circle-2": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 360,
+            "holes": 6,
+            "text": "2"
+        },
+        "full-circle-5": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 360,
+            "holes": 6,
+            "text": "5"
+        },
+        "full-circle-10": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 360,
+            "holes": 6,
+            "text": "10"
+        },
+        "full-circle-20": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 360,
+            "holes": 6,
+            "text": "20"
+        },
+        "full-circle-25": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 360,
+            "holes": 6,
+            "text": "25"
+        },
+        "full-circle-50": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 360,
+            "holes": 6,
+            "text": "50"
+        },
+        "full-circle-100": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 360,
+            "holes": 6,
+            "text": "100"
+        },
+        "full-circle-250": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 360,
+            "holes": 6,
+            "text": "250"
+        },
+        "full-circle-500": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 360,
+            "holes": 6,
+            "text": "500"
+        },
+        "full-circle-1000": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 360,
+            "holes": 6,
+            "text": "1000"
+        },
+        "full-circle-2000": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 360,
+            "holes": 6,
+            "text": "2000"
+        },
+        "full-circle-5000": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 360,
+            "holes": 6,
+            "text": "5000"
+        }
+    }
+}
\ No newline at end of file
diff --git a/full-hex.json b/full-hex.json
new file mode 100644
index 0000000..9b01393
--- /dev/null
+++ b/full-hex.json
@@ -0,0 +1,95 @@
+{
+    "parameterSets": {
+        "full-hex-1": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 6,
+            "holes": 6,
+            "text": "1"
+        },
+        "full-hex-2": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 6,
+            "holes": 6,
+            "text": "2"
+        },
+        "full-hex-5": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 6,
+            "holes": 6,
+            "text": "5"
+        },
+        "full-hex-10": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 6,
+            "holes": 6,
+            "text": "10"
+        },
+        "full-hex-20": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 6,
+            "holes": 6,
+            "text": "20"
+        },
+        "full-hex-25": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 6,
+            "holes": 6,
+            "text": "25"
+        },
+        "full-hex-50": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 6,
+            "holes": 6,
+            "text": "50"
+        },
+        "full-hex-100": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 6,
+            "holes": 6,
+            "text": "100"
+        },
+        "full-hex-250": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 6,
+            "holes": 6,
+            "text": "250"
+        },
+        "full-hex-500": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 6,
+            "holes": 6,
+            "text": "500"
+        },
+        "full-hex-1000": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 6,
+            "holes": 6,
+            "text": "1000"
+        },
+        "full-hex-2000": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 6,
+            "holes": 6,
+            "text": "2000"
+        },
+        "full-hex-5000": {
+            "diameter": 39,
+            "height": 3.5,
+            "sides": 6,
+            "holes": 6,
+            "text": "5000"
+        }
+    }
+}
\ No newline at end of file
diff --git a/mini-circle.json b/mini-circle.json
new file mode 100644
index 0000000..ce32b83
--- /dev/null
+++ b/mini-circle.json
@@ -0,0 +1,95 @@
+{
+    "parameterSets": {
+        "mini-circle-1": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 360,
+            "holes": 4,
+            "text": "1"
+        },
+        "mini-circle-2": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 360,
+            "holes": 4,
+            "text": "2"
+        },
+        "mini-circle-5": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 360,
+            "holes": 4,
+            "text": "5"
+        },
+        "mini-circle-10": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 360,
+            "holes": 4,
+            "text": "10"
+        },
+        "mini-circle-20": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 360,
+            "holes": 4,
+            "text": "20"
+        },
+        "mini-circle-25": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 360,
+            "holes": 4,
+            "text": "25"
+        },
+        "mini-circle-50": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 360,
+            "holes": 4,
+            "text": "50"
+        },
+        "mini-circle-100": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 360,
+            "holes": 4,
+            "text": "100"
+        },
+        "mini-circle-250": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 360,
+            "holes": 4,
+            "text": "250"
+        },
+        "mini-circle-500": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 360,
+            "holes": 4,
+            "text": "500"
+        },
+        "mini-circle-1000": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 360,
+            "holes": 4,
+            "text": "1000"
+        },
+        "mini-circle-2000": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 360,
+            "holes": 4,
+            "text": "2000"
+        },
+        "mini-circle-5000": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 360,
+            "holes": 4,
+            "text": "5000"
+        }
+    }
+}
\ No newline at end of file
diff --git a/mini-hex.json b/mini-hex.json
new file mode 100644
index 0000000..6e4377a
--- /dev/null
+++ b/mini-hex.json
@@ -0,0 +1,95 @@
+{
+    "parameterSets": {
+        "mini-hexagon-1": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 6,
+            "holes": 3,
+            "text": "1"
+        },
+        "mini-hexagon-2": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 6,
+            "holes": 3,
+            "text": "2"
+        },
+        "mini-hexagon-5": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 6,
+            "holes": 3,
+            "text": "5"
+        },
+        "mini-hexagon-10": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 6,
+            "holes": 3,
+            "text": "10"
+        },
+        "mini-hexagon-20": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 6,
+            "holes": 3,
+            "text": "20"
+        },
+        "mini-hexagon-25": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 6,
+            "holes": 3,
+            "text": "25"
+        },
+        "mini-hexagon-50": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 6,
+            "holes": 3,
+            "text": "50"
+        },
+        "mini-hexagon-100": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 6,
+            "holes": 3,
+            "text": "100"
+        },
+        "mini-hexagon-250": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 6,
+            "holes": 3,
+            "text": "250"
+        },
+        "mini-hexagon-500": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 6,
+            "holes": 3,
+            "text": "500"
+        },
+        "mini-hexagon-1000": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 6,
+            "holes": 3,
+            "text": "1000"
+        },
+        "mini-hexagon-2000": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 6,
+            "holes": 3,
+            "text": "2000"
+        },
+        "mini-hexagon-5000": {
+            "diameter": 22,
+            "height": 2,
+            "sides": 6,
+            "holes": 3,
+            "text": "5000"
+        }
+    }
+}
\ No newline at end of file
diff --git a/parameters.json b/parameters.json
deleted file mode 100644
index b9ac950..0000000
--- a/parameters.json
+++ /dev/null
@@ -1,17 +0,0 @@
-{
-    "parameterSets": {
-        "1": {"TEXT": "1"},
-        "2": {"TEXT": "2"},
-        "5": {"TEXT": "5"},
-        "10": {"TEXT": "10"},
-        "20": {"TEXT": "20"},
-        "25": {"TEXT": "25"},
-        "50": {"TEXT": "50"},
-        "100": {"TEXT": "100"},
-        "250": {"TEXT": "250"},
-        "500": {"TEXT": "500"},
-        "1000": {"TEXT": "1000"},
-        "2000": {"TEXT": "2000"},
-        "5000": {"TEXT": "5000"}
-    }
-}
\ No newline at end of file