Hello, I have a single pickup bass, the Epiphone EB-0, and I would like to add a Jazz Bass pickup to the bridge position. I hate using routers, so I've decided to drill out most of it with a Forstner bit, then use a chisel and a file to finish it up. My questions include: How deep should the cavity be, and how much room should there be around the sides of the pickup? How should I wire it so I can have a three position selector, with neck, mixed, and bridge settings, and what sort of switch should I use for that? Also, how should I ground all of it? I'm certain that I want to use my method for routing the pickup cavity, so please do not post about that not being the right way to do it.