Hi Everyone, It’s my first post on the forum and recently, I’ve been working on a Optimus No. 00 and fettling it ready for use. I took out the pump to take a look if the cup was still in good condition... I was greeted by not a leather cup, but instead a rubber o-ring that was brittle and what appears to be a botched together pump. I’m new to fettling these stoves however, from what i have seen i’m certain the pump should not be put together like this and the the thread is missing on the end of the pump rod. Does anyone know how to go about acquiring a new rod and end assembly?