I just wanted to do a sort of follow up on that kief grinder thread. The common spacecase metal 3 chamber grinders create mass amounts of friction when used. For all who own one, unscrew the middle chamber,and run your index finger across the main threading of the grinder. When I owned one, and did this ,a massive amount off aluminum shrapnel came off the threading . Mine was a 130$ spacecase grinder, I've seen low end 50$ kief catchers ,and can only imagine.. Not only do smoke organic buds ,but this is why I try to keep all my smoking habits as 'organic' as possible ; wood>metal. Stay stoned everybody.