Clecoed on the elevator horn—the holes on the spar side don’t line up very well. Have seen this issue on other builder’s logs. Finally had to ream a couple of holes out to get rivets in—this left the holes just a bit oblong. I elected to add 4 more rivets—maybe a bit of overkill, but this is a rather critical area. Next, I riveted the c/w rib to the spar, then clecoed on the tip rib and riveted it to the spar.