I too am a firm believer in being properly prepared for a job. I may end up getting an air compressor and impact wrench. Up until now I never really needed it for anything...
I did use a series of punches and chisels but no luck so far. They're crimped on very tight with practically no room to wedge a punch or chisel.
Do you think a decent impact wrench and air compressor will get these off the way they are crimped now?