oh im sorry FA you were asking about the piston it is accutaly a bolt i turned the head dowh to just fit in the tubung then turned a groove into it for the o ring then welded the bolt to a steel rod i kinda rough ground the threads on the bolt so it will punp a bit smoother at the top of the stroke still need to grind some more but i dont have a top cap on it yet and was ready for test
Boar
