Hi Doodles and welcome to 3FC!
I moved your question to a thread of its own because I didn't want it to get overlooked. It's a great question!
I didn't have a TT, but I had a lower body lift which included everything in a TT. In my experience, I looked much, much better after a year than just eight weeks out from surgery. When I was at your stage, I was still pretty swollen. It took three or months for the majority of the swelling to go down and for me to start seeing the new contour. Everything was pretty much settled down after a year or so. So you're only going to be happier and happier as the months go by, I'm sure!
As for how to maintain the great results, you're right -- Rule #1 is absolutely do not gain weight!! That's the one thing that will un-do all the work. If you gain weight, your body is forced to grow more skin to cover the fat it's storing and then if you lose the weight, you're stuck with all that excess skin.
Do you follow any kind of diet or exercise plan now to maintain your weight? That's going to be the key to your long-term success. Oh, that and sticking around 3FC too!
Best of luck to you -- you're going to be loving your new look in the months to come!