When I got home. I dove into mounting the aileron trim onto the plastic mounting block. First item that the plans have you do is to angle the arm 10 degrees down.
Next, I fit the assembly and marked the cotter pin hole and drilled to 1/16”.
Once that was done... The shaft of the trim arm could be trimmed down. That steel is really tough....took me a while to cut on the band saw. Once the rough cut was done....I trimmed it down on the sanding station. I then installed the large washer and cotter pin. As I want to prime before assemble...one of the items I need to do before priming is countersink the #10 mounting screw. Not a quick process....But it’s done. I’m now ready to prime.