after some really helpful insights by John B , Henry S and Ron W , as well as JY — it appears that possibly the U channel we use in restoration from Gary might be adding significantly to this issue ?? Does anyone have an unrestored set of channels ? maybe the original U was deeper or no or thinner metal at bottom of U or flocking was attached directly to factory back piece ? That is all guesswork on my part at this point , but for sure somethng is definitely wrong after restoration I have others , 4-5 c D , this one may just be an extreme case ,like the one Henry S had . but it seems all those mentioned had a flavor of this problem . 57 dodge 2 dr hardtops same deal . Right now going to see if narrowing window tab at rear is at all feasible . We only need 1/8 to 3/16 i think to let it move freely . My car has new metal U prelined , done many years back , I assume Gary G parts . -- For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang --- You received this message because you are subscribed to the Google Groups "Chrysler 300 Club International" group. To unsubscribe from this group and stop receiving emails from it, send an email to chrysler-300-club-international+unsubscribe@xxxxxxxxxxxxxxxx. To view this discussion on the web visit https://groups.google.com/d/msgid/chrysler-300-club-international/5F4757CF-FABF-4CCC-A471-0AD2E7C412AE%40gradyresearch.com.