Rotafix on rear wheel?
So I've got a rear wheel that I want to use on my fixed, and it doesn't have a stepped threading on the hub, it only has enough threading to screw on the cog. I don't know if that means it is supposed to be a freewheel hub or not, but I was wondering this: If I were to utilize the rotafix method to secure the cog, would I be able to safely ride the bike, if I installed brakes? Or would this not be a good idea? I've been trying to find a proper rear wheel, but the wait is killing me, and I really want to go riding soon, though I don't want to get impatient and make a dumb decision that will potentially kill me.