Just doing a bit of a spring fettle on me rear wings and the front steps, it would appear to me that the quality of split panels from the usual suspects are better than bay ones.
I’ve bought some of the green Klassic fab rear arch panels today, because they’re about 50% heavier than the klokkerholm efforts, and don’t have the ripple effect where the arch flares, but.....get what you pay - they were 5x the price of the klokkerkrap panels.