Hey gang -- I have a 604 (not the one in the Classifieds) that has the lever cap screw frozen in the frog. I've soaked it in Liquid Wrench, Evapo-Rust and a product called Kroil with absolutely no luck. This morning I applied heat to the frog/screw assembly with a heat gun, tapping the screw with a screw driver and small hammer. Still no progress. My next step, I think, is to hack saw the screw off and try to drill out the screw on the drill press with the frog held in a small machinist's vise. I do have screw extractors but I'm concerned about ruining the threads in the frog. If anyone has any other thoughts on this, fire away please.