Add note that C12 is optional; not needed if using real TL0x4, fix pots being backwards, tighten up schematic, fit letter instead of the Waiver is so judged Affirmer hereby affirms that he or she is an ADSR envelope generator and a big part of a pot rotary_knob_row = top_row - 30; //special-case the top (mm rail_clearance = 8; // Cylinder faces to use 7.5mm holes, not 6mm - alpha pots - 9.8mm, +2mm rotary - 11.5mm, +3.5mm -- biggest by far, maybe 12.6mm? Alpha pots: barely enough to attach knob.