Yes, thanks Doug for the manual, can't believe I didn't check your site for that.
Meanwhile: What is it with me and chrome??

I had my lovely early Caravel about ready to go last night, the old seals seem to be in great shape so I was reassembling after cleaning with Joe Glo, but the chrome on the piston snap ring started falling to pieces.
Couldn't find any stainless steel snap rings locally, so have ordered a few from McMaster-Carr.
