Customized based on the Jan Ray circuit. ・Changed the GIN_VR value ・Changed the OP_AMP bias value ・Replaced the saturation TR with a fixed resistor ・Added a buffer circuit, etc... These have been changed to my liking. I like the straightforward distortion feel...!! Made with an original design printed circuit board. If you want to try making one yourself, I can provide the printed circuit board, so please comment. If there are any imperfections in the construction, please understand that it is a handmade product. //Specifications// Circuit: OPamp non-inverting amplification Di clipping circuit Function: Overdrive Pots: GAIN x 1, VOL x 1, TREBLE x 1, BASS x 1 Bypass: True bypass Size: 100 x 130 x 40 (excluding knobs, switches, etc.) Power: DC9V (center negative) Type... Electric guitar