The final step in this build was to install the rear wheel bridge and brake mount. I wasn’t really sure about the best way to go about this, but after a few minutes in Home Depot I found a few metal nuts that I could epoxy into the bridge to give the brakes a proper support. After aligning the bridge and the nuts at the right angle I epoxied them in place and wrapped them in hemp. Once it had cured 48hours later I sanded everything down and drilled a hole through the hemp to expose the metal mount for the brake. Perfect fit.
The final steps were simply running the cables and wrapping the bars. I was temporarilly holding the cables in place with electrical tape, but eventually secured it to the frame with steel cable stays directly epoxied to the frame.