The gills/louvers seem to be a hit, guess they’re staying :)… and thanks for the encouragement!
BTW, someone asked why the louvers can’t all be made from one panel. It’s because the A-arms have to snake their way through, and builders have to be able to tighten the inboard A-arm mounting bolts. Also, the assembly has to be removable even with the A-arms in place, which isn’t possible if it’s one assembly. For that reason each will be its own little dealeo, maybe with screen on the outlets to further clean up the look, or not.