Greetings all, new member here...
I wanted to weigh in on suspension upgrades with my solution. After years of towing with leaf springs and electric drum brakes on several TT and finally my 2015 Cougar,I decided that this system is marginal at best, so I performed an upgrade. I decided on Dexter Torflex 7k axles using 13'' rotors, 4 piston calipers, and 8) 9/16'' bolts. I used 17x9'' wheels and 245/75 17'' e rated tires.
The stock set up had 4400# leaf spring axles, 15x6'' wheels, and 225/75 15'' d rated Trailer King tires.
It tows and brakes sensationally. I have my own website with a detailed description with pics if you're interested in seeing the complete project. BTW, I am not selling anything, just posting my projects.