im really unsure what to make of this rippling fibreglass chat
the wide arches on the rx7 are feed items, genuine, bloody expensive mo fo's! the fit was perfect, effortless infact, as are the majority of all genuine items. you pay the price for quality!
as for rippling with hot and cold...im based in scotland...we have had two crap winters, and our summers have been pretty good with quite a few days of blistering sun
the rx7 has no bodywork blemishes or funny lookin bits after almost 3 years of having the kit fitted and painted by a well recommended local garage.
the kit the car had on import was also a wide arch effort from Odula. that had been on the car much longer and altho had some fibreglass damage from track use, the actual decent bits looked as new paintwork...and that would have had the japanese heat and winters
so from my experience, i had never seen it
i think if you get it fitted and painted by a very good garage and dont cut corners, you will have very impressive results