There have been several wonderful stationary filers on HMT. I looked at them closely but most of the work i do I don't need a flat finish and often I'm needing to take off quite a bit of material. I decided to make the die grinder from my radius cutter do double duty as a stationary die grinder.
I had a spare 80/20 linear bearing, a chunk of 80/20. I had been wanting to cut down the drill press centering fixture I got Little Machine Shop that I'm using to mount the die grinder to the 80/20 as it was twice as long as it needed to be. So now it fits better, and I have the other half to use on the drill press again, score!
3"x2" angle for the table and base bolted to the linear bearing. The bearing has a brake to lock the die grinder/ 80/20 unit in the bearing. I could also make the die grinder articulate up and down with a motor drive like the filers do but so far it's been uneccessary. It has come in real handy so far with small carbide bits and it has made getting into tight places much safer and easy to control.