Hi Johnny! Love your work. I fully agree a mid drive is the way to go. I got pretty close to getting a donor bike, even shopped frames and thought of building one from the ground up. However, as fun as an egravel bike would be for me I decided it’s best (simplicity, cost) to just convert my daily run-about.
Mine is an SE Lager single speed, not fixie. I live in a downtown area and also use it on local paved paths and maybe gravel. In this case wouldn’t a hub motor be best? I‘d like to learn more about this kind of motor. Geared or dual speed hubs? Regenerative braking on direct drive, resistance and efficiency, top speed vs torque, noise? Anything else?