Thanks Scott and Glenn! I agree Scott that there is going to be no extra flap position with the center controls. I am good with it!
My last picture of my master cylinder mount was poor. Following the plans I have zero edge distance on the bolts. Perhaps the dimensions of the master cylinder have changed or something. So, I came up with my own design to keep moving forward. Stock Sonex on the left, mine on the right.
This is my own permutation, not blessed by Sonex or guaranteed by myself. I used thinner (.050") but sterner (7075-T6) stuff and did a little fancy brake work. I can tell you that if you ignore the proper bend radius on 7075 it will break! After that little lesson I cleaned up my act and it came out good.
AN5 bolts are specified for the MC but they are more like 9mm, or 21/64+ if you prefer. I made some shims for now out of flashing, but will look for better fitting bolts. The flashing shims let me locate the holes nicely.