The Southern Pacific Railroad, which knows something about rotary plows, uses a diesel electric to drive the blades but it still has a steam boiler ...
Unless you are touching something grounded like a faucet a GFCI is not going to do anything. If you are in the middle of a building with a dry floor...
Better then scratching around the piece to be removed is a quick spraypaint job. May want to do a quick masking with tinfoil to control over spray. ...
The unisaw mount is pretty easy to make using large angle iron bolted to a standard foot mount motor. I think I lost about 1/4" in cutting height by...