Re: my first build.
Get a manic mechanic hub, nothing beats that, or a disc brake rear hub and a sprocket that bolts to the disc hub. I think kings sprockets has them. The rag joint it comes with will move and never be totally true and flex under load risking a thrown chain, I threw a chain once going around thirty. It locked up my rear wheel and shredded my spokes and sanded my tire down to the tube. I was not fun! Good luck!