bgn wrote:Interesting. I wonder if it's as effective at heatsinking as the solid brass group. I bought a 30 year old Cimbali lever years ago and went through piston seals twice a year. The brass in the group was pitted. The Cimbali dealer found a never used group for it and I replaced the entire group. Cost me $1000. Now my piston seals are good for a couple of years. But when they leak it rusts the spring and I have to replace the seals and the spring which is also expensive. Would love a machine with a stainless steel spring.
OldNuc wrote:EPDM and NBR are not really rated for the temperatures that are experienced in any of these groups