Hi folks. a close friend is having trouble with grinding his weed due to arthriti in hands. we have tried huge grinders and ones with actual grips, which got him this far. BUT has come to a new poiint where just cannot do it. He is now using coffee grinder, which does the job but really is hard to get the rough grind he look for. I am now on a quest with Christmas coming up to find him a better option. do any of you elder statesfolk have any experience with this or suggestions?