I've got two power staplers for my business. My air stapler shoots a 1/4" x
3/4 18 gauge staple into wood boxes. Sounds just like yours before mods. You
pull the trigger and that thing goes. No safeties on this old init.

The other is an electric box stapler out of a large factory. Its got a four
foot high post with a shoe. Slide the formed box over it and step on the
foot actuator. You start getting two staples per second.

I've got three machines on the place that no one else operates. These are
two of them.

Karl