air chisel, works pretty good if you can get a bite on an edge. Burning out the rubber, helps to get to the edge. Alot of the time you just have to carefully hack saw the metal sleeve, after you burn out the rubber. Even then I still use the old air chisel to punch them out. You just have to work around the metal sleeve to get a good edge for the air chisel to push against.
If your not living on the edge, you're taking up too much space.