Here's a copy of an email I just sent to Gabe at Bass Northwest: Hi Gabe, Gantt Boswell here in New Orleans. I just ordered a Bart HR5.4 wiring harness from you guys, the one with 5 pots (volume, PU blend, bass, treble, mid) and a three-way mid-frequency switch. I already had a set of xxM45C's. This is for a Gecko project. I'm in the process of learning about the bewildering variety of wiring options. Some things I've read even talk about a 6 or 7-way rotary switch to access the various combinations. What can you tell me about this? Can you boil it down to a simpler set of options? Do you know of anything I can read that will help? The Bart website is pretty useless. I've read a million threads on TB and the Pit but no one really nails it as far as a clear explanation/discussion. Thanks, Gantt What I'm looking for is a description of sounds - a boiled-down primer of Bart wiring 101. Can anyone help? Thanks.