Nailed small blocks of wood to longer 2x4's. These were then placed under the two forward straps around the aft forward skin, around the bottom and lower sides of the fuselage. Finished back-drilling the top skin by laying on my back. Had to use the 12'' #40 drill bit and angle drill in some areas to finish drilling. Used laser level to line up the F-606 bulkhead for drilling, although the holes ended up going crooked. Took out all clecoes and removed both top skins from fuselage. Found that a few holes in the top of the F-606 bulkhead and the F-xxxx were out of alignment and so holes are oblong.
