@U_Stormcrow gave me good advice about the roof and DH watched a bunch of YouTube videos on it.
We got the screws from the supplier of the metal to make sure we got the right ones.
Doesn't sound extreme to me.
Neuchickenstein is 6-7 feet at the back and about 10 feet (or was it 12?), at the peak of the clerestory.
Height is good in a hot climate. It gives the heat someplace to go.