So far the motor cable is happy, the caliper fits without any interference, and the caliper pads are making good contact.
The opening in the middle is extremely tight, so that could use a bit more diameter. Had to add one extra axle washer to avoid a collision (the bolt holding the arm to the dropout was hitting my rotor's "mid plate" bolt heads).
Could fix the collision with a revision that uses chainring bolts instead of these normal m5's, but I'll see how the V1 fares in ride testing before I consider another cut order.
Nice build, battery fitment is everything along with the full suspension, keeping the bumps minimized, dialing in the spring rate and I bet she rides over the bumps real smooth. Tire tread pattern and widths are terrain dependent, nice to have the option to go wide or narrow on the tire. Looks to be a 2003'ish Kona Stinky, I'm in the market for something similar.