EDIT (2nd time)...I played it again this AM (working from home). I think the attack knob is working properly. Weird but seems like every time I turn the pedal on it gets a little better without me doing anything. This AM the attack pot was acting quite a bit smoother than before. there is still a peak at the 10% mark or so, but whatever.
Sensitivity knob is still weird
under 50% (CCW to "noon") pedal produces no sound. I could tape a stick of dynamite to the pickup and blast my guitar into 10,000 pieces and the pedal will produce no noise.
50%-100% (fully CW) here's a description of what happens while attack is maxxed at about 7.5% (max attack):
50% - nothing
60-80% - strum all strings hard, faint sound increasing
80-100% - getting near full volume to full volume
Here's a new pic, I just saw you wrote you're color blind. I'm curious, how do you know which resistors are which when you build? EDIT - I checked these resistors 3 times vs the PDF instructions. They seem right but would certainly appreciate a second opinion. TIA