Thanks Dave & Dave.
In school, I suggested spring loaded chucks. Some really scary stuff at times. There were folks who smoked and/or dank their lunches. One guy, his breakfast as well.
LOL, this one kid was a future rap star. Not making this up, he walked away while threading a some bar stock. The tool drives into the chuck. Made some really interesting sounds as it got destroyed. So I wrote him a rapper's theme song. (Can't be posted here, snicker)
But anyway, thanks again. Very much appreciated.