Continued drilling in the aft lower skin tonight, and discovered that the bend I have in the skin is still insufficient. I thought I wouldbe able to pull it down with an acceptable force (5 lb or under) but I see that the 149.625 and 142.625 bulkheads will take a bit more bend than I have. I took the skin off and put a bit more on, but I think I may not weigh enough to get enough force down in that area. I will try to concentrate the bend more near the corner of the bulkhead tomorrow night.