I blame genetics, poor lineage, on why I cannot assemble guitar hero controllers from Radio Shack components and bits of twigs/leaves/string. Because this PS2 GH controller looks like the work of dark magic, a Frankenstein's Guitar, if you will. Just check out the process on assembling the strum button:

I took apart a small switch, put a broken drill-bit into the upper part of the switch (not the electric, but the mechanical), because it is hard, so it won't break (it will be pushing the buttons). After that i cut the trigger-pad in half, soldered it (common GND!!) glued the button gums to the trigger pad, placed it to the switch as seen on the pic and glued the whole thing. It works perfectly!!!!!

To my feeble mind, there's simply no way that nonsense is possible. I believe this controller to be the work of conjuration and propose its maker be burned at the stake.

How to make a PS2 Guitar Hero controller out of scratch [via engadget]