I have a RadRover 5. I did the Bolton upgrade on the controller, Bafang motor and hydraulic brake calipers. The controller comes with a 35A controller and upgraded color display. The motor, rated at 750w had more torque for hills.

Has anyone seen the new RadRover 6 Plus?  The $2000 bike seems to be configured with similar specs as the Bolton upgrades. The other difference is the integrated fitting battery.

I actually had an issue with the stock controller on my RadRover 5. Power kept cutting out on me. I did the Bolton controller, Bafang motor and hydraulic caliper brakes upgrade. I needed more torque and power because I live in a hilly area I'm constantly in assist 4 or 5. I only get around 20 miles out of the stock battery when using that much assist. Performance is excellent and my power loss issue is resolved.