I was organizing my equipment at the end of the year and am selling some items to declutter. This is a modified RAT pedal. The op-amp is LM308N, and some capacitors seem to have been changed. The op-amp is socketed for easy replacement. I used it after I got it, but it was removed from my board. I checked the operation, and there seems to be some crackling on the distortion knob? The volume increases around the 0-1 range, but I didn't feel any problems during normal use. Also, when the distortion knob is past 12 o'clock, the attack sound cuts out if you pick very hard. I didn't notice this because I didn't turn the gain up that high. Although it has some quirks, I hope someone will take good care of it.