Using the plywood left over from the firewall, this step is just making 4 jigging blocks.

I did this very carefully and it was probably overkill yet all a part of trying to keep the build standard as high as I can.

The blocks fit two on each gear support as in the third pic. I had to open the holes just a touch so they would slide over the knurled tube.

Blocks match drilled

Trimmed per plans

Jigging blocks on gear