Well hopefully you can sort it out to work for you yet let me suggest for the record or for the future that if people really want something fast and configurable that they retrofit a Bafang centre drive motor setup rather than an off the shelf bike.
It may not look as neat or professional yet even the base model is configurable from 250 watt all the way to 750-1000 watt depending on what voltage its set to work with. Run it at 52 volt for max performance.