I've found that using a smallish mortar and pestule type set up work dandy! preferably one with high sides and a smooth glassy finish. I just ground mine down and eat it, and then it's off to the races:juggle:
dude addy balls are softer than fuck, they always seem to bust right up for me... only real hard beads ive ever come across though were from hydromorphone xr's.... now THOSE, were a cocksucker to break up!
this was always my method, but as stated before, those addy balls I don't find too hard... might just be me though... but boy do they get nice and fine haha, especially with this method... just make sure your screwdrivers handle is smooth of you get what I mean... I used one with a matte finish kinda thing and like a 5th of the powder I had got stuck to it and I had to desperately try to snort it off the handle :bigcry: you can probably picture that