Damn, he is making a rear hub also. That is really good that finally someone is designing this stuff for Ebikes. The problem I find with ebikes is that bicycle components are too weak and dirt bike components are too heavy and strong. This is why electric bikes fall in the middle and need their own components.
Same goes with tires and rims, the motorcycle tires and rims everyone uses are way too strong and also heavy for ebikes. Yet any bicycle tire or rim on the rear is too weak.
I'm personally not going to get involved with mid-drive stuff until it progresses. I'd want to see an adaptto silent sine wave controller that works with middrive, plus a more quiet drive train. I also heard that there is some lag or delay in the drive train? Someone said that with his mid-drive setup it was very difficult to wheelie the bike because of a delay in the drive train from when giving throttle to when the rear wheel moves.
I think mid drives are still a couple of years away. The hub motors work just fine for me with my custom cooling modification and probably for the fact I don't weigh so much so climbing isn't an issue unlike for you guys who weigh over 200 lbs.
So I'll just wait it out and let you guys do all the work perfecting it.