Brief Description: F-704 BH - Final drill F-704C/D uprights.
I think it's time to rivet these uprights to the spar center section. before you put any clecos in, you first put 6 wing bolts partially through. These bolts are tight and this gets the 2 parts perfectly alligned. Then put a few clecoes in and final drill all the holes. Here I show 2 of the 4 that need to be drilled.
