I think you've got to use a tumbler because it's done wet. In a vibrator type, you don't get the liquid mixing with the pins and brass. Not sure, never tried.
Still happily answering to the call-sign Peetza.
The problem, as you so eloquently put it, is choice.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.