Struggled with the nose skin install until I figured out the problem. The rivets I used to secure the trim servo unit were encroaching on the nose skin edges as I was sliding them into place, making me think for a long time something was major wrong because the holes were not lining up. I ground off the nose skin edges for clearance where the rivets were touching and the problem was solved. Riveted the top side skins on. 49 total hrs. to date.