Fabbed a spacer for the left side rear bulkhead/skin gap. Used a .025 for spacer for the last 2 rivet holes and a .063 spacer for the last hole. Match reamed #41 the holes for the aft skin/F810 bulkhead. Because of the thickness of the single spacer, I put a c/s in it and did not dimple the bulkhead beneath it. Removed the skin and bulkhead. Deburred, scuffed and dimpled. Temps tomorrow should be warm enough to shoot some primer and then I can rivet the F810 bulkhead to the fuse.