solved it, wasn't any of the mod's fault. I put the switch directly below the gain pot, and had to rotate the pot itself by 180 degrees, and aparrently the short remaining leads of the pot pierced through the insulation and touched the chasis and thusly shorting everything. Wasn't really expected so I gave naturally blamed it on the first thing that came to mind, unfortunately that was this mod. Sorry, no hard feelings, eh? 
The mod sounds great, btw. I don't know if this occurs with the stock version, but I also did the keeley mod and at higher gain settings it produces a sort of fluctuating-gated-tremolo effect. Awesome, if I may add. However, it seems that some of the bent signal passes through even with the switch off. Might be due to the keeley mod, not really sure. But I have another on it's way and I do intend to do this mod again, however I'll try a DPDT to cut out two leads of the transistor and see if it gets rid of the "leak".

Cheers!