Yep, hats off to you guys who've built a -4...With the availability of the pre-punched kits in the newer models, it makes it seem even harder to build a -4.
As far as the aileron, the guy I spoke with at Van's (didn't get his name) said the RV-8 and RV-4 ailerons were not interchangeable. He suggested I take apart the aileron, dig up the part numbers from the plans, then order the parts I need to repair it.
Thanks for the info,
Mike