Hi @DAWIII - I suppose you could put it under the rib but gutters are installed after the roof is on and the gutter strap extends up the roof slope beyond the closure strip. So it would be difficult to install - considering the mastic and everything. With that said there's nothing structurally wrong with doing that. Just no good way to put it on. I can't share images in comments but if you'd like to reach out via email or something I could share a construction detail that would show it better than I am explaining it. Thanks :) Eric

Thanks Eric! I really appreciate your reply. I hope to make it up to Grand Junction soon, and I'll hit you up with some questions then.