Very interesting. I've got a few questions Eric, if you don't mind. Since there are only 2 valves that control the fluid flow, what type of wear was evident? Could the valves be turned or lapped to re-establish the seal? There appears to be some type of hydraulic ring seal used also, the bore inside the regulating valve where the seal rides looks worn, can this area also be re-polished and maybe a replacement seal used?
It would help to see the procedure used for dis-assembly, or does the ends just unscrew?
Thanks for posting the pictures, it sure looks simple enough.
Have you heard from the Polish guy with the key replacement rubber? If this works, I wouldn't mind buying a couple myself...
Thanks for your time,
JR