A little behind on the log. Used the 3 flute countersink to make a die for dimpling the last 3 holes in R-904. Then I used the male dimple in the rivet gun to dimple the holes, after practicing on some scrap. You can see in pic 1 the difference in quality from squeezed dimples. Still find it ridiculous Van's doesn't factory dimple these holes like they do on the elevator ribs.
Dimpled the left elevator skin like an old pro. The most important difference was moving the C-frame to the main table, where I have 360 access. The other table is hemmed in on three sides. I will never use any tension or pressure to hold a skin in place again. Used another set of hands when necessary, or weighted the piece in place when solo. Also used outfeed supports on the bench to keep the piece in place.
shot last 3 dimples
left skin dimpled on main bench with no casualties
