Went to Cooper/Halo website & poked around. I used the H7ICAT, and went to trims. 4 were on the spec page (trims) and 3 were OK for that can; 1 was not.
Looks like a spec sheet trail is going to be needed.
BTW, who checks to see if the gasket/caulk is properly installed after shtrock & before trims????
George, you're killin me