So if I wanted to add...
- a second battery,
- a battery combiner,
- and an aftermarket controller plus display for more speed.
But keep my working stock battery in the frame tube...
I could still keep my Shengyi motor and connect it to the new controller,
and connect the new controller to the correct terminal on the battery combiner,
and then connect the orignal in-tube battery the way you did on one of the battery combiner terminals and the other battery on the other terminal and have a 30 mph top speed?
Did the aftermarket controller plug into everything including the motor without a bunch of splicing?
I'm sorry to keep bugging you, but I'm very enthusiastic about doing this if it's possible.