I picked up a grindmonster from 1984 in almost new condition earlier this year. Usually takes friends/guests/family a couple hours to notice, it is quite camouflaged. This thing grinds very consistent at boulder and planetary settings. I'm jealous of those of you with rotary knob control: mine has 5 settings, and then "control" requires removing the case.
I removed the front chaff flap, and get no real grinds retention. However, it is very very messy with coffee dust all over everything nearby. I'd love to add a short little tube bent downwards to aim grounds down into my grounds cup.