This thread piqued my interest so yesterday I dug out the wonder drive I made maybe last year. I did a few mods to it based on another thread where where pedalpcb had another version of the pedal and was detailing the differences. I changed a few things but I forget what now.
I haven’t used it much since I usually like some grit and drive from a tubescreamer-like boost. I mostly play high gain and for reference I will usually run a tubescreamer with the level all the way up and the drive between 9:00 and 12:00. Also I thought the wonderdrive kinda lacked some character and was just a little tubby on the bottom end.
not a scientific test or anything, I played it for like 2 minutes, then added three 1n4148’s as asymmetric clipping over the drive pot like was posted above. I was expecting a tubescreamer-like Drive knob but the clipping it added is quite subtle even turned all the way up. Not sure if that is a function of the drive pot value, or maybe there should be a resistor between the diodes and leg 1 of the pot (just comparing to tubescreamer schematic).
Though I do think it sounds better, a bit tighter and grittier which addresses my issues with it before. I’ll give it a few days to see if it will earn a spot on my board.