If you're just having problems at the end of your long-lamination.... my trick is to:
purchase white cotton (lint-free) gloves, and as I'm laminating... I use both my hands in a sweeping motion (like karate kid, wax on-wax off) from center to the outsides as it is in motion.
this way, I keep the material flowing to the outsides (and dust-free) as it pulls through and keeps any chance of buckling in the center.
p.s. I run a Seal 54 Base, as well.
40 pressure, (high but not max) tension on the laminate, (high but not max) tension on the print... and I only remove the guard on short runs.