I can use some help on a Lyman Universal case trimmer. Can someone tell me the deal with the set screw on the cutter assembly? I have a really hard time getting the pilots in or out of the cutter. I removed the set screw on the cutter but either the hole does not go all the way through or else there are two set screws in the shaft. I am going to plead ignorance so tell me what is the cause of my problem. Thanks. Joe