I assembled the F-01411 bulkhead a while back and had tweeked the flanges to pretty well fit the F-01479 aft bottom skin (they still need just a little more). Today, I have been working on shaping the cutout in the aft bottom skin for the U-00018 tail dragger spring mount. In the process, I clecoed the F-01411 bulkhead in place to help position the spring mount. What I found was that the rivet holes in the two sets of flanges are farther apart than the matching holes in the aft bottom skin. I'm sure that I need to tighten the radius at the base of the flanges but need a suggestion for a good way to do that. I did try gently compressing the tips of the flanges with a clamp but didn't want to take that very far as it seemed fraught with peril.
Any ideas?
Any ideas?