Attached front half of 904 bulkhead with 7/16" temp bolts from the hardware store using my earlier made spacer blocks where the wing spar will fit. Countersunk some of the holes underneath called for in the plans (read this part and study the plans carefully!). Drilled all of bottom skin except for and aft 2 rows that will overlap other skins.
Note - 915 outer rib flange should be on the INSIDE of the 904 upright, not out as here
