That sounds like a great options list. I like that you were able to get spring over from the factory. Any options for shocks? Although you probably don't need them with the factory 3500lb springs. What about a tongue jack/dolly?
What's this "7 pin harness w/ HOTWIRE support"? Any details for the Hotwire piece?
The coupler, I assume, is one of the types that uses two bolts to secure it withing a vertical channel?
My personal commitments have eased slightly, so let me know if you still need help this weekend. I'll be around and able to sneak out for short periods of time with a kid in tow (he loves trailers too).
-