I would like to put a drum brake on an old bike I'm building. my first thought was to use a tandem hub, but I don't want to respace the frame to 140mm, and I am going to run it singlespeed anyway. I did some searching, and the drum brake is threaded 1.375"x24 pitch, the same as a freewheel. My thought now is I just need a flip flop hub, I should be able to thread a freewheel on one side and the brake on the other. Has anyone else tried this, I would like to know before I start buying parts.