If it were me Id call etrailer.com (number is on their website).
Talk to Tech Support and tell them the info re TT, ask their advice.
They not only sell items they know what comes back with problems and which doesn't.
IMHO their knowledge base would be invaluable to you in making a selection. Ive used this method before when looking for other items and they have saved me from a serious mistake.
2012 Wildcat Sterling 32RL, Gladiator Qr35 ST235/85R16 Load rating G, TST 507 TPMS w/ Flow-thru Sensors & Repeater, Reese Sidewinder 16K Pin Box, PI EMS HW50C
2008 Chevy Silverado 2500HD CCSB LTZ Diesel, Fumoto Oil Drain Valve, Turbo Brake activated, 39 gal Aux Tank W/ Fuel Pump transfer, Air Lift Loadlifter 5000 air bags.