It has burs because he's just detuned it.
If you use a fine file to begin with then you might not need a gummy stone. Snowboard tools are awfully expensive in the stores, when I bought my base edge guide the shop tried to charge me $50 for a flat bastard file. I went to the local hardware store and bought basically the same thing for $9.99 instead.
Just get yourself a stone or fine file, it's cheap to do, rough edges suck.
Last edited by Reede; 12-08-2010 at 01:01 AM.