Time to deal with the pre-bent skins and figure out how to dimple them. Because they are clamshells, there's no easy way to mange the c-frame dimpler and use it like I normally would. I pulled off the blue film and tried a few methods. While I was trying to sort out how to use the c-frame, I went ahead and hit the holes around the edge of the skin with the squeezer and also dimpled the stiffeners with the squeezer. I had heard that some people use the pop rivet dimpler, so I gave that a shot. It works, but it's a slow process and doesn't make dimples that are quite as crisp. I can see using it on a hard to reach area, but don't think I want to use it unless there's no other option.
Back to the c-frame I guess. The only way I could really manage things myself (not having someone to hold the skin open) was to reverse the dimple dies and use the male die on the upper set that gets hit with the hammer. I prefer to have the male die on the bottom plate just because it makes locating the hole and keeping things aligned a little easier, but not much choice this time. Using the c-frame like this let me open the skin and keep it open by sliding it down the bench legs. It took forever doing it this way, but ultimately worked okay. I did have two holes near the bend that I screwed up because I didn't keep the skin flat enough when I hit the die. It created a ding at the edge of the dies. Lesson learned. At least it was on the bottom side.
