Over a 3 day period, I went through each step of the fuselage manual and checked every step for quality control, and to determing what was left to do on the QB kit. All work was good quality with only minor discrepancies. F-904J Center Sectiom spacers were spot on on the right side, but were maybe .008 too tight on the left. We'll see if the wing spar fits OK. There is a little flex in some of the parts.