Thanks for the link. That’ll be ordered ASAP. Cant hurt to replace everything you can as like you said its 70 years old.

How do you know if a piston pump is to thick or too tight in the channel? To me it seems snug, it will slide up and down but with a bit of force though. I always thought the gaps side to side were not that large but have been afraid to modify it since the original is crap and this is all i have. Maybe I’ll order another pump so i can experiment with one of them.

Shane