Thanks for the input Bob. I have already ordered the airsafe hitch I know the cost is greater upfront but hopefully it will pay dividends in wear and tear in both the TV, RV and driver down the road. As for the pin box they make one without the air-ride as for the length I would have to check on that I believe they are the same length as the factory but don't quote me on that. The big advantage is the turret that allows it to turn where it connects to the RV that is 22" further back.
I had to chuckle about the tailgate mount!
This is my first fifth wheel have a Keystone Hobbi tag-along now it's a whole lot shorter and not a problem getting in my yard, I have yet to back a 5er up it may turn better than I expect but then again the 3612 is about 12' longer.
I may be worried over nothing about backing it into my driveway. But if I were to get the sidewinder it would be the lesser expensive version that just pivots under the RV less the air bag and shock. Still on the fence about that maybe further input will lean me one way or the other.
Thanks again.