Too bad about your PUP, I have a '90s vintage and I have never had a problem with the lift system. The seams leak after all these years and I had to patch them.
There is of course no comparison to the convenience of our TT, but they are two different animals so to speak. I still keep the PUP for those rare times when it is a better fit. Usually a solo adventure.
I am sure you will enjoy your TT, we use ours as often as possible. It is really nice having food, clothes, water and camp gears loaded and ready to go without packing and unpacking.