NO! Sorry I'm obviously not clear.
I have a P-38 and the cylinders are 4-5 years old and still don't leak.That is my only experience.

I do agree that there has been a lot of stuff sent out that wasn't developed or tested. For a long time it was a joke at UK meetings about gear working. It's improved a lot recently for sure, but it needed too.
It's not easy on small dia rams, tolerences are much tighter, some problems are simply down to undersized rams being used...

Dave