I'm researching my fixed gear frame options and when it came to outfitting with a wheelset I thought it would be cool to use some old wheels I currently have. They are Rolf Vector Pro's and I don't use them anymore (got a nicer wheelset!) so my question is can I fix the freewheel mechanism somehow? I looked at the Surly Fixxer but it only works on Shimano hubs. Is my only option to tack weld the mechanism?