Did a bit of research, the really nice ones have adjustable rollers, but they are pretty expensive. However I did find a motorized grinder that holds 2.2 lbs of material for about $150. It has gotten pretty good reviews on Amazon, I'll probably order one eventually. My orange head colony eats well over 1 lb of food a day. So the grinder to would get used a lot and would be much quicker/easier than my Nutrabullet.