I Just recently changed a puncture on my fixed gear, after replacing the wheel when I tightened the tracknut up on the drive side when it got halfway tight it just keeps turning, I can't fully tighten it, it just keeps going round. Have I threaded the axel or would a new tracknut do? Problem is I am not sure if I can remove it, will try later today. I have cheap formula hubs,is it fixable or is the axel probably bust? Or time for a new better hub? cheers!