I've bought and restored a 1984 Forrester insert and have bought a flex liner insert with a 6" boot. Me and my father in law went to install the insert and slip the boot on and found that the insert was a VERY good fit, in fact so good of a fit that we found ourselves questioning how we were going to install the boot. It adds an extra 4" of height that we don't have, and we are trying to fish the boot around the stove and not having much luck. Did I just buy a stove too big? Or is there some trick I'm missing?