Pulled out all the components and got to work. I had to fabricate I believ it was 633 for the control column. I chose not to cut the “extra” off to save weight. It's only like an ounce or three, so not worth it. Drew a centerline, drilled one hole per plan dimension and then back drilled the other making sure everything was square. Also drilled the shear bars 704G after putting some bolts in make confirm alignment. The front face of the shear bars had to be countersunk per plans for a 426 rivet.

I also attached (not permanent) the 610/11/12 control column pieces and figured out the proper washers needed. I think I got it close. This did take some filing and sanding to get everything to operate smoothly, much like the ailerons, it has a brass bushing with the steel rotates around. Everything disassembled and primed as needed. The control column mounts were bolted and torqued to the center section.