Two seasons ago I had my 171 Anthems center-mounted (obviously) with Rossi bindings for a 308mm BSL. Now that I've outgrown those boots, I bought a pair of boots that have a 326mm BSL, and I'm wondering if I can just slide the heel piece back on the track, and have the skis ride like they're supposed to, or if I'll have to remount them to accommodate for the longer boot.