So the idea is to buy a Jazz Bass kit from http://www.diyguitarshop.co.uk/kits.htm#jb and modifying it with a built-in overdrive circuit. From a purely "where will it all go?" stand point, I've decided to have a friend rout some cavities for me underneath the scratchplate (space for the OD circuit between neck join and neck pickup, and a 3-way switch on the lower horn, and channels for all the wiring running to join the pickup wire channels) and will move the jack socket to a side mount ala Telecaster. I want to use an OD pedal that has a small-ish circuit that will be simple to remove pots and connect new pots in the control panel. I was planning to use a Boss BD-2 if I could as this pedal is woefully underrated, so will ebay/b stock it where possible. My question is this - I can competently read wiring diagrams and follow them, however I know very little about PCB circuits. I want to use a stacked pot for tone/gain and a push/pull to control level and on/off, and then single neck/bridge volume controls for the pickups. What is the best way to wire the existing pot contacts on the board with the pots at the control panel, and what type of pot would be best to use?