I inspected the fittings the other day and I didn't see any sweating or movement. With a couple people having issues I was definitely concerned, but after this many miles and a HPDE weekend I think if something were to happen it already would have.
When I get my headers I'll give everything a better look once it's on a lift. I'll probably get rid of the zip ties too per the manufacturers recommendation.
Thanks for the good words guys, hope it helps you out