I recently built my first ebike. Started with a Mongoose Envoy cargo bike. Went with the BBSHD, egg rider, and a 52V 50 amp battery. I have a Lekie 36-36 single speed drive train. I am getting good torque and top speed of 15.6 mph. I then purchased and installed a Torque X 3000W controller. There is a boost of low end torque, but top speed is exactly the same. I was thinking speed would go up some. Am I missing a setting that should be changed, or is this to be expected?