Ive used a space case grinder, and I own my own 3 chamber one with a screen. There is no need to spend alot of money on a grinder, mine was like 20 bucks at a store. Has an ash tray on top of it and as well as a screen to collect kief. it works just as well as any space case for a fraction of the cost. but the space case ones are smoother, and sharper than mine.