I sometimes do trimming that way. Trimmer is on a plywood base, and it sits in a lid from a office
storage box, basically 12x18 corrugated box lid with 2" tall sides, keeps chips contained. Pour in brass to the lid,
and put a coffee "can" (plastic now) for the trimmed brass. Trim, deburr and drop in the can.
Mindless, fine for watching TV. dump the brass chips out of the lid afterwards, no mess.