Finally sat down to build my custom trailer wiring adapter. Instead of using the T-One connectors (that require two spliced together on CUCVs, unlike civvy trucks) I made a weatherpack inline adapter. You can have both your civvy plug and NATO plug wired up all the time. Going to get a mounting bracket and dust cover from eTrailer, got the wire from Walmart or Target, I forget. Has builtin LED tester. All my weatherpack stuff came from HipoParts.com. This was also my first weatherpack project, these are pretty easy to work with when you get the hang of it. Plan on doing my fuel pump with weatherpacks as well, so something I could do at the kitchen table served good as my weatherpack training wheels. I'm considering making more of these if there's any interest, could use various trailer plugs, combos, etc, whatever I can pick up at eTrailer's place down the road. Wouldn't be too cheap though, weatherpack is expensive and there's 4 housings on one adapter, probably minimum $20 for the most basic setup like this. Any suggestions for improvement? I plan on using liquid electrical tape over the butt connectors tomorrow.