I purchased a Lyman 45 at an auction about a year ago, and cleaned it all up and removed the 267 die that was mounted in it. I currently use an RCBS Lube-Sizer and most of my sizing dies are RCBS and later model Lyman dies. I discovered that the original die for the Lyman 45 press is precisely machined to fit in the press, as the clamping screw pressed the die to one side. The newer dies are machined several thousandths smaller in diameter, using an O-Ring to take up the space and center the die and designed to work with the current large nut hold down from the top, as RCBS has used since the beginning. Since the clamping screw will not allow me to use the newer O-ring dies without miss-aligning the die by several thousandths, do I need to buy the old dies to work in this Lyman 45? Or is there another solution?