The “HOLD” feature in the schematic above takes some fine tuning to get right. There are parallel resistors and buffer resistors, a pot and a switch. The values of the potentiometer and resistors for this feature are meant for reference only. I’ve found that they often need to be tweaked from model to model. If you are new to bending, don’t bother with the adjustment and the trim resistors, just wire the switch to the two “hold” points on the main board. The same goes for the “LOOP” feature. The adjustment lets you fade between loop and glitch effects, but it takes some tweaking. It’s much easier to take out the pot and resistor and just wire in the switch.