finally came around to finalize and integrate my mods.
lots of wires... luckily they do not affect eachother noticeably, midi to trig is done with a cheap "deek robot" board and some simple code (had someone help me with that, maybe i can post the code if someone is interested):
closed case, i went with a polycarbonate hammond but coated the inside with copper tape for better shielding, it fits the board, trigger converter, pots and connectors quite well, not much space left though:
and the mod point and pot value details, i used only little information for the usual points and tried to find some of my own. when two wires are attached the pot replaces the resistor, for snappy decay you need two wires, other values just put the pot against ground, so you can run one ground wire to the pots and minimize wiring effort:
i also came up with a closed/open hihat circuit idea which sounds quite good to me, i may post a sound demo soon.
one problem i noticed, and i think it is not because of my mods - the snare sounds a little different sometimes, the "snappy" is varied a bit and sometimes the body pitch changes slightly. it is more than the usual "analog variation" you have in drums, anybody experienced this behaviour yet?