I had a drill bit sharpener that wasn't very effective, so I took the guide casing off.
It has a nice little wheel in there about 3/4" wide and fine grit.
It is compact and great for most of the small grinding done on the building bench.
When the blades come off the mower though, time to bust out the big one.
It would be real nice if you have the space to get one of those combo sanders
that GPutt has. One day....