Both sidewalls needed significant thinning and reshaping to permit the fuselage to fit properly at the wing root.

Even after the modifications, there were noticeable gaps on both sides of the trailing edge of the wing root...

...the port side upper wing root...

...and the starboard side upper wing root. The wing roots of the upper wings had been trimmed too.

A small gap was present on the upper surface of the starboard horizontal stabiliser.