Slide one of the U-1003 Brake Mounts onto the U-1001-L Main Gear Leg axle. The hole on one side of the brake mount is still undersize and needs to be final-drilled. Align the holes in the brake mount with the holes in the axle, insert a 3/8" drill bit through the assembly, and final-drill the smaller hole. Remove the brake mount and deburr the holes.
Make six (three per side) U-1008 Spacers from AT6-058 X 3/8. Each spacer is 21/32" long. Instead of these parts, I purchase the spacer from planearound.com. They are much more robust and should eliminate the cracking issue that currently flying aircraft are starting to experience. Build the Left Brake Mount Assembly. The Brake Torque Plate is supplied with the brakes.
Slide the Left Brake Mount Assembly on the axle of the U-1001-L Main Gear Leg and secure it in place.