I'm going to start with the steel battery rack (since it's finished) for testing. Later if I want to shed more weight I'll make a plastic one.
Just did some final grinding and sanding to get an ideal fit. Tomorrow I can drill the holes for bolting it to the frame.
All of the frame components and battery rack will eventually be powder-coated flat black.
Next comes getting the tires off of the rims. I'll have to wait until I can borrow the tools to get them off. Then I will start rebuilding both wheels after painting the rims.
Some good news about switching from the brushed motor to the brushless hub motor. The hub of the rear wheel is pretty trashed. The previous owner had drilled through and used long bolts to hold the chain sprocket.