It won't help the antennas, but after much consideration I'm going to add another bluetooth relay to my roof rack (I have one underhood at the moment) and use it for switching. This allows running power/ground up to roof once using 12 awg (via the windshield channel), and then switching at the roof. Another option would be regular or mini relays on the roof and using a small gauge switching wire (such as an ethernet cable, could get 8 switches out of that) and the 12 awg. I'm just doing lights and they are great application for BT switching - it is obvious when they are on, and if you have to re pair BT or reboot or something (which happens every three months or so), 15 seconds of doing that won't be mission critical.Thanks to everyone on this thread. I have a lot of wiring to do for lights/antennas on the roof that will wire into my fuse block attached to the forward face of my drawers and have been stumped about the best way to bring the wiring into the cabin. This thread has provided enormous help in planning that effort. My Saturday is now fully planned!