Hello.
I am from the south of EUROPA, but i understand very good german and i have read this page cypax very carfuely and there are a few good ideas.
I think to put a control unit from the in momento alible PENDELEC will not be a problem.
I am think to put a brusless motor in the front wheel hare are 12inch motors with well for about 120USD.
But first i will make a littel expirience with the orginal motor.
Ah you can wirte me in German
iam a nativ German.
Best regards.
Thorsten