Looks great. I'm a bit jealous of how much space you've got to work with. But I do like having my roof vents too.
I used the same Renogy Zee clips. They seemed fine to me, but the one downside I saw was that it is pretty much impossible to remove a panel from the clips. Can't get to the bolts. Or, you have to pull them up from the roof and tear through the Dicor. If I do have to remove a panel, I won't do either of those. I will just saw through the clips, leaving the lower 'L' portion at the roof, and improvise a different upper portion. Assuming the new panel was the exact same width. It's enough of a long shot idea that I didn't put too much worry on it.