I used a hack saw and hand file to remove all the unwanted bits from every bike that I have converted to fixed (11 so far). If you have access to a Dremel tool, then by all means use it. If not, the oldskool way of doing it is fine. You would probably be able to do a better job of removing the unwanted bits than somebody at a bike shop as you can use your time to do a "perfect" job where as the employee of a bike shop would do a job that is "Good enough" as it is not (their bike).

fixedgearhead