Dimpled everything. The instructions say to machine countersink the trim tab spar and the hing, but they are thin enough to dimple, so that's what I did. I think it will be stronger this way, and the flush rivets looked as they should.
To get the holes in the second hinge half (that attaches to the elevator) I slipped the hinge between the elevator skin and the elevator spar. I could then do all my alignments and it was all held in place.
Then I started (but did not go through) holes in the hinge, using the holes in the elevator skin as a guide. Then I took the hinge apart and drilled the rest of the way through the hinge on the work bench.
That was if for tonight. One more photo on the next page.
Laying out the hinge-to-elevator connection
I put the hinge between the skin and elevator spar & used the skin holes to drill the hinge
