Just put the bottom bracket conversion unit in,and the three piece alloy crank-
got the crank used on ebay and annodized painted it red- loses some serious weight- I have to take this up and down the stairs- tho down isn't much of a problem!
Speaking of a flip/flop above- Yes, the sproket holes match the diameter and yes it can lock down LATERALLY with a lockring-
but because it's not threaded it still must be held in place to pull the hub- here's a tread I posted recently with a puicture of one I put on a high flanged hub that didn't have any holes in the side before I drilled them- It HAS to be high flanged or you will have to use a rag joint.
The high flanged hub clears a motor sproket that has the six inner disk brake holes. I used a small 32 I had around as a pattern to drill this 41 stock kit sprocket.