Posted by This turned out to be quite a tricky step, requiring lots of patience. It’s important that the flaps and aileron trailing edges are aligned with a (string) line from wing root to wingtip.
My process. Attach rivet, clamp in place, and check alignment. Realign, rivet. I spent several days on each wing for this step. Plus some back and forth with the factory. Top tips, use duct tape to hold it in place. Use a rivet with the mandrel removed to form an easily removable rivet place holder. Take your time.
In the end, the LH flap aligned with hardly any match drilling. The LH aileron required 3 attempts but went on quite well after fully clecoing it first. (including dimpled holes).
The RH wing was the other way. The flaps required several attempts and in the end many of the outboard holes needed to be match drilled (no more than ΒΌ of a hole). The RH Aileron aligned with no match drilling.
Just tolerance build-up I suppose.
