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The empennage fairing did not fit too well. A large 4mm gap at the leading edge of the HS. It’s a nice snug fit on the VS, but not able to pull the fairing down to be flush with the HS. After discussing with the factory, I elected to add some flock filler along the fairing edges around the HS. (West System resin plus 403 filler).
Drilling the 6mm holes in the fuselage for the rivnuts was a breathtaking moment. In the end, it all lined up very nicely. For easier inspection, I have decided to use flanged M4 hex button head bolts to fit.