Hey again,
well, finally I have some news - lots of testing and finding where the hell does the JE1000 pureness come from. And I believe we have it all. High quality film caps, metal film resistors, transistors with all parameters same as originals (you would not believe how difficult that was), and audio quality electrolytics from Panasonic.
I was not sure, if you want this with the push-pull:
1 - bypassing entire JE1000. That means Pushed = JE1000 active, Pulled = JE1000 bypassed, only output volume pot active.
Or this
2 - turning on the GAIN switch, which means Pushed = JE1000 active with GAIN switch on, Pulled = JE1000 active with GAIN switch off.
So I made it universal and you can select which one you want. As you can see on the 3D model, there are three pinheads (those black ones) and you can put them to the left or right. Under them on the PCB you see white rectangle. When those pinheads are set on the white rectangle, that means option 1 is active. When they are on the other side, option 2 is active.
Of course, removing the cable from the guitar disconnects the battery to prevent discharging.
This is important - PLEASE, check for me if it fits in your guitar! Dimensions are 63 x 26 milimeters, height is around 20mm, depends on the pot. With the pushpulls I have here now, the guitar body can be 8mm thick. Is that enough or shall I make some special nuts to allow thicker guitar body to be used?