Heres my experience with WE BL-36
My WE instructions were incorrect on motor installation instruction; my wire bundle drops out on the RIGHT side rather than the left side.
They dropouts on the forks will have to be widened slightly and the forks will need to be spread a bit
I had same problem and was advised (endless-sphere forum) to file down axle on motor rather than widen dropouts (don't want to weaken them). I wound up filing my axle a bit and removing paint on dropouts.
Also had to spread my forks using my Honda car jack.
Soneil smart charger is great - red light when charging and light turns green when fully charged and turns off automatically
Recommend you install a torque arm on the motor axle.