I've been using a RCBS 11 sizer/luber since selling off my Stars a few years back. I ended up having a blowout on the rubber O-ring that goes on the pressure disc. I ordered a pack of replacement O-Rings from an industrial parts house. They only had packs of 100 but the O-ring is better made of a Nitril material that is both heat and abrasion resistant.
If any member who uses this RCBS machine would like a free replacement for a bad one they have or just an extra for an emergency, contact me. If you send me a self addressed envelope with the postage paid I'll put you a couple in for free.
My information is as follows
David Shultz
17195 David Dr.
Livingston, La. 70754
Take Care David