T-trak modules are designed to be moved constantly and they do so wonderfully. Partially because of their size and partly because they don’t have a ton of dangly bits that the N-Trak stuff has. N-Trak on the other hand are larger free standing modules that are in fact clamped together. They use standard type track and have a small 4” piece that is not glued down in the gaps between modules. It works pretty good. I’m involved with 2 N scale clubs, one T-Trak and one N-Trak but I have only built T-Trak modules so far.