George,
Wow, I'm impressed. You bought the high dollar version Transfer Flow tank with the TRAX II fuel gauge. My old faithful TF tank is the plain Jane version. I have to guess how much fuel remains in my TF tank. I reset the overhead console trip odometer each time I refuel and estimate tank level based on 10 mpg when towing.
I'm looking forward to reading your impressions when you tow your fiver with your truck.
Mine now has a little over 7,000 trouble free miles on it and I'm very satisfied with the way it drives empty or tows at 25k gross combined weight.