Final fitting and start drilling of the F-842 aft belly skin. Using a taught string I deterimened the bulk heads were in a straight alignment. Dharma assisted in pushing the bulk heads and ribs into position while I drilled holes and installed the cleco's. I still need to devise a way to pull the belly skin down into position prior to drilling the F-824 side skin to the belly skin. I want them to be in the correct posistion with some force not just laying there. Maybe some straps and long wood to place pressure on the entire length.