If it helps, there are other BikeE middrive conversions here on ES. If you look thru this list
https://endless-sphere.com/forums/search.php?keywords=bikee&terms=all&author=&sc=1&sf=titleonly&sr=topics&sk=t&sd=d&st=0&ch=300&t=0&submit=Search
you can see some of which ones are relevant by title, and others are obvious once you start looking thru the actual thread.