diff --git a/NOTES.md b/NOTES.md
index 6d1ac42..c3ea4d7 100644
--- a/NOTES.md
+++ b/NOTES.md
@@ -1,11 +1,3 @@
-I did some performance testing.
-
-The Pro Micro runs an Atmel 32u4 at 8MHz.
-If the code does nothing else,
-I was able to poll all pins around 13 times every 1ms,
-or 13kHz.
-
-
 Sample Rate
 -----------
 
@@ -39,6 +31,10 @@ I settled on a 40ms silence window as feeling pretty good.
 You can adjust this if you want to.
 
 
+
+USB Junk
+========
+
 Gamepad Buttons
 ---------------
 
@@ -46,28 +42,38 @@ The `buttons` struct member is a bitmap,
 each bit mapping to one of the 12 buttons reported through HID.
 Here's what each bit means:
 
-*  0: Blue
-*  1: Green
-*  2: Red
-*  3: Yellow
-*  4: Orange
-*  5: Tilt Switch / 2x kick
-*  6: Solo modifier (second row of buttons on guitar)
-*  7: ?
-*  8: Minus
-*  9: Plus
-* 10: Drum pad modifier?
-* 11: Cymbal modifier?
-* 12: ?
+* 0o00: Blue
+* 0o01: Green
+* 0o02: Red
+* 0o03: Yellow
+* 0o04: Orange
+* 0o05: Tilt Switch / 2x kick
+* 0o06: Solo modifier (second row of buttons on guitar)
+* 0o07: ???
+* 0o10: Minus
+* 0o11: Plus
+* 0o12: Drum pad modifier
+* 0o13: Cymbal modifier
+* 0o14: Select
 
 
 hatAndConstant
 --------------
 
-I don't get this, but here's what the values mean:
+Here's what the values mean:
 
 * 2: right
 * 6: left
 * 0: up
 * 4: down
 * 8: nothing
+
+
+velocity
+--------
+
+I don't know how I can verify that I'm setting this right,
+but the `rbdrum2midi` program looks at these bytes to detect hits.
+I set them to 127 when a hit is detected on the digital pin.
+
+Sending these values does not seem to cause problems with my Wii games.
\ No newline at end of file
diff --git a/README.md b/README.md
index f7dbce6..d9a48be 100644
--- a/README.md
+++ b/README.md
@@ -16,39 +16,154 @@ which are very quick!
 * A physical controller
 
 
-## Sample controllers
+# Controllers
 
-I used the following:
+## Guitar
 
-* [MiniCaster](https://www.printables.com/model/479046-minicaster-mini-clone-heromidi-controller) 
-  by Vlad the Inhaler:
-  it comes with full build instructions.
+I 3D printed the
+[MiniCaster](https://www.printables.com/model/479046-minicaster-mini-clone-heromidi-controller) 
+by Vlad the Inhaler.
+It comes with full build instructions.
 
-* [Cheap children's drum toy](https://www.amazon.com/Electronic-Sboet-Practice-Headphone-Christmas/dp/B0CHJMYCH9/),
-  each pad is a momentary switch.
+## Drums
+
+I bought a [Cheap children's drum toy](https://www.amazon.com/Electronic-Sboet-Practice-Headphone-Christmas/dp/B0CHJMYCH9/)
+from Amazon.
+There are dozens of copies of this thing,
+the one I got was on sale for $25.
+
+I had to unscrew the cover and remove the
+logic board, battery, and speaker.
+The pads were connected with
+a sort of ribbon connector,
+which I desoldered and removed,
+then placed in my own perma-proto board.
+
+I also hooked up a 3.5mm TRS jack for the two pedals,
+which I could have desoldered from the toy
+(I already had these).
+
+I'm sorry I didn't photograph or record any of this,
+but it was pretty straightforward.
+
+
+# Compiling
+
+This compiles in the Arduino IDE.
+It doesn't have any library dependencies.
+
+You need to make two edits to `boards.txt`.
+Instructions for this are all over the place.
+
+Find your board, and edit the `build` lines.
+Don't edit anything that doesn't say `build` on the line! I can't help you if you do this.
+
+In my examples, I'm editing the lines for the leonardo build. Yours might be different:
+it should match the board you're using.
+
+## Build flags
+
+This disables serial communications on the board.
+
+    leonardo.build.extra_flags={build.usb_flags} -DCDC_DISABLED
+
+Hat tip to Nicholas Angle for figuring this out
+so I didn't have to.
+
+## VID and PID
+
+These set the USB identifiers.
+VID is the Vendor ID,
+and PID is the Product ID.
+
+`0x1bad` means "Harmonix Music",
+at least, it does to the Linux kernel.
+
+### For guitar
+
+PID `0x004` means "Guitar controller".
+
+    leonardo.build.vid=0x1bad
+    leonardo.build.pid=0x0004
+    leonardo.build.usb_product="Mockband Guitar"
+
+
+### For drums
+
+PID `0x3110` means "Rock Band 2 drums".
+This works better with all versions of Rock Band on my wii,
+even if you don't use the cymbal inputs.
+
+    leonardo.build.vid=0x1bad
+    leonardo.build.pid=0x3110
+    leonardo.build.usb_product="Mockband Drums"
 
 
 # Wiring
 
-![see standard.hh for pin connections](wii-rb-std.png)
+Both the guitar and drum kit I used
+provide simple momentary switches:
+nothing fancy like a piezo.
+If you're using fancier types of inputs,
+you'll need to modify the source code.
+
+## Guitar
+
+![guitar wiring](guitar.png)
+
+| silkscreen pin name | description |
+| --- | --- |
+| TX0 | strum up |
+| RX1 | strum down |
+| 2 | tilt switch |
+| 3 | green |
+| 4 | red |
+| 5 | yellow |
+| 6 | blue |
+| 7 | orange |
+| 8 | no connection |
+| 9 | wammy bar (see note) |
+| 10 | plus |
+| 16 | minus |
+| 14 | orange solo |
+| 15 | blue solo |
+| 18 | yello solo |
+| 19 | red solo |
+| 20 | green solo |
+| 21 | no connection |
+
+The solo buttons and wammy bar are optional.
+I don't use them.
+
+If you hook up a wammy bar,
+be sure to uncomment the `#define WAMMY`
+in the code!
 
 
 ## Drum Kit
 
-On the drum kit,
+![drum wiring](drums.png)
 
-* Orange: kick pedal
-* Solo Buttons: cymbals
-* Red Solo: high hat
-* Tilt: 2x kick
-
-I think. I haven't been able to test this yet,
-but the Clone Hero wiki leads me to believe this is how it works.
-
-You can hook up a wammy bar for the drum kit,
-and it will be sent the same way as the guitar.
-I don't know why anyone would want this,
-but I'm not going to tell you how to live your life.
+| silkscreen pin name | description |
+| --- | --- |
+| TX0 | no connection |
+| RX1 | no connection |
+| 2 | 2x kick |
+| 3 | green |
+| 4 | red |
+| 5 | yellow |
+| 6 | blue |
+| 7 | kick |
+| 8 | no connection |
+| 9 | no connection |
+| 10 | plus |
+| 16 | minus |
+| 14 | no connection |
+| 15 | blue cymbal |
+| 18 | yellow cymbal |
+| 19 | hi hat pedal |
+| 20 | green cymbal |
+| 21 | no connection |
 
 
 # Bugs / Not Yet Implemented
@@ -61,3 +176,9 @@ Until that happens,
 just
 [email me](mailto:neale@woozle.org),
 and I'll open an issue.
+
+
+# Need help?
+
+[Email me](mailto:neale@woozle.org),
+I'm friendly :)
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