further to my problem with sunlova kit (lack of pedal assistance ) they have supplied me with new sensor but this has not made any difference at all , i can only assume it is the controller as other users of this kit are reporting 14-15mph on throttle and 15-17mph on pedal assist .this may turn into a nightmare as if it is the controller a new one won't work with my battery and rack (older type) unless anyone knows different ?