Sure thing J. Sand away the fuselage sides a bit thinner, and also sand thinner the resin side walls; especially the raised part along the bottom on the back of the side walls. Just sand away until the resin sidewalls fit nice inside the fuselage, so there's no gap at the top sills. This is where Aires molds the canopy lock mechanism. I had to use a bit of filler on the top sills on my build. You'll have to grind the top of the wheel bay insert a bit thinner. I have had the best luck glueing the resin sidewalls to the fuselage first, then fitting the tub in. I don't glue them to the tub first. This is because the curve of the resin sidwalls doesn't match the curvature of the fuselage. Way to go Aires, huh? I'll post some more cockpit pics up soon.