Opened up all holes to A5 on rear fuselage and step bkts. Ready to deburr and Zinc chromate and rivet. The support gussets in 6B15 - 4 are all four the same but the predrilled side skin on the rear gussets puts the bottom hole way to short of edge distance so I will have the make the rear ones on each side 75 mm long instead of the 65 as they are made.
