This is a populated Madbean Boneyard II pedal. This thing with some humbuckers really does sound like a classic 60’s Marshall amp. The breakup on this thing is really warm sounding and not shrill at all.

Madbean Boneyard II (TRANSFER)

Looks like I need to do a bit more wet sanding on this PCB… I was thinking of adding a Madbean Thunderpuss to the input of the Boneyard for a nice clean boost. I will test it out before I box it up in a 1590BB.

Madbean Thunderpuss (TRANSFER)