On-board wiring with booster

[rankot]

Hi guys, Happy New 2022 to everyone!

I was thinking of installing few mods to my guitar, so this is the schematic - passive volume and tone control for pickups, followed by switchable JFET booster, then master volume and kill switch. I believe I should put that R2 so it can discharge C4 when booster's bypassed, and I wired it this way so it doesn't waste battery when in bypass mode, or when jack is out. Any obvious mistakes? Maybe I shall add discharge resistor for C3, too?

[PRR]

C4 can't hold charge with Rs there.

Turning power off when in bypass is sure to POP big-time, every time. Leave everything on until you pack-up.

Yes, C3 is liable to pop.

[rankot]

I've tested this booster earlier and it works quite fine with this Rs/C4 combo. So I don't thinks that's the problem. I will try to attach a switch to it in the morning, and see what happens with popping.