In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Turns out the folks that make the S-5 clip now have a bracket for the delta rib type roofing. I got a few and tried them out this weekend on my well house roof. Their background is in the metal building industry, so they understand the challenges we face with metal roofing mounts.
The ProteaBracket is a well constructed, heavy gauge stainless bracket that is adjustable.
I bolted plated strut onto the bracket, then clipped the collector to the strut. They do have some test data for loading available from a third party testing lab.
The silicone rubber roof boot is from aztecwasher.com
Bob "hot rod" Rohr
trainer for Caleffi NA
The magic is in hydronics, and hydronics is in me