The RV-7 and RV-8 share most of the wing parts in common, but if you're building an RV-7 you have to trim off some of the rear spar due to the different width of the fuselage between the two models. I'm sure Van's does this to save a few pennies, rather than just punching a couple buttons on the CNC machine and producing the correct parts for the kit in the first place. Anyway, the plans include a full-scale template of the area to trim, which I xeroxed and then transferred to the rear spar stubs:
Nothing gets the blood pumping like hacksawing through a quarter inch of aluminum and then filing and polishing it until it shines. Except doing it twice, I guess. Ignore those things that look like nicks, they're just reflections from the camera flash.
