I'm doing the basic ignition tune up on the Ty (cap,rotor button, plugs, wires). I've got the new plugs and wires in, but I can't seem to get the rotor button off. I know they can be a pain some times, but his one is really stuck. I've read here, and on other forums, about having to break them off but how would I go about doing that without damaging the distributor shaft? I've even heard of guys using a hammer and chisel to break hem off but I'm a little hesitant to try this for the same reason. Any suggestions?