I drove the truck & trailer a couple of miles away to a highschool parking lot to readjust the brakes, and noticed that the temps that I am monitoring were all showing to be in acceptable ranges. In fact, the TFT stayed around 196. But then I noticed that I still had the Gryphon set to 87 Custom Performance Tune.
So I changed it over to the 87 Custom Towing tune, and the temps all shot up a bit. Now the TFT was showing 212.
Not sure why there was such a big variance in the temp readings, going from one tune to another.
Anyhow, I was able to fine-tune the electronic brakes to where it felt like the trailer and truck were both braking well. No more "bouncing" axles, and it never felt like the trailer tires were locking up. I was also able to back the trailer up pretty well, which is something that I was worried about.
I've ordered some Superleaf Springs, to help with the "sagging butt" backend of my truck when the trailer is hooked up. I'm hoping that it helps out a lot. I'm going to call the shop that installed my liftkit this morning, to see what they recommend.