The Accu-weight sticker info. on my 263RLS was within 50Lbs (the scale tolerance). The Kodiak rep confirmed that full propane tanks and battery are on the TT when weighted. I cannot comment about the CCC, since we pack light - even with the 4 kids, cargo was weighted at 460Lbs (before and after on the scales).
For the tires, I have not replaced the Akurets installed on the TT since I bought it new. 9000 miles and 3 seasons later, they are still in very good shape. Don't overload your rig, check the tire pressure everyday while on the road, and don't over-speed (I drive at 60 MPH).
I use a basic Reese WDH, with the Reese Dual-Cam anti-sway installed by me. The TT tracks beautifully behind the truck - 2 fingers highway drivin'.