I'm planing on cutting an access panel in the back of a 335 style guitar. It's nothing collectable at all. In fact without some new electronics it's worthless. I've rewired several semi-hollow bodys by accessing the F hole, but this one has very small F holes due to some 2-ply binding. Someone has stripped everything off this guitar so all I'm starting with is a neck and body, which has some decent appointments, like binding, 5- ply on the front and back, 2-ply on the neck, headstock, F holes. I don't like mini pots, just my preference, but I don't care to use them. This guitar won't even allow for mini's. I think that someone gave up on this project after realizing that rewiring was going to be a real pain unless, you cut an access hole in the back. My plan is to use the piece I remove as the cover, so here is finally my question. How would you make this cut? I have a template to guide a rotary tool, but 1/16th is the smallest bit I can find, which I think will be ok. Obviously the smallest line possible is what I'm going for. Having never done this before, I'm not sure that my plan is the best way to approach this, so I'm open to any advice on how to best achieve this without mucking it up. My friend bought this off CL for 30$, but like I said it's got some features that are worth putting some time and money into. I told my buddy that if I can do this, then I can put in some nice componants, 50's style wiring, then it's worth going the effort to refinish it and install all new hardware, nice pickups, tuners ect. So whether this project goes on to be restored or goes back on CL comes down to getting this access panel done right. Any help is highly appreciated.