"I have a 10" Forrest chopmaster but unfortunately I made the mistake of starting a cut on a steel plate without checking which blade was in the saw" :-D Did

"I have a 10" Forrest chopmaster but unfortunately I made the mistake of starting a cut on a steel plate without checking which blade was in the saw" :-D Did something similar with a hollow chisel mortiser. The head was hitting the fence, so I didn't set the depth stop. Which was fine, until I moved the table to cut another mortise in a location where the head didn't hit the fence. Turns out you can't cut square holes in cast iron with a hollow chisel and auger bit :-/