Heya Wyome,
Kits are good for trailers and such, but all this stuff I'm doing is custom. At least I'm running extra circuits now so I only have to do it once, hopefully. I'm still on the fence about disconnect plugs under the headache rack in case I have to take the bed off someday. Any interruption in an exposed circuit is an invitation for problems later on down the road. I have plenty of good tools and quality materials to work with.
How you doin' man?