Thanks guys. Tapping the roof with a hammer to locate the trusses proved faster and frequently more accurate than using the $60 stud finder. Had to use a probe wire on every pilot hole to verify we hit the truss, and even then some missed when we drilled them for the 5/16" bolts. (moved and re-drilled) Used peel-n-stick under every bracket, and covered every bolt head with neoprene flashing from a caulking tube. Sealed the brackets to the roof with neoprene flashing from a caulking tube to keep out wind driven rain from a hurricane. I'll see if I can find a photo showing all the Microinverters hanging on the rails and add that to the collection above, since this thread was about microinverter.
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