I do intend to fill from the pilot side so I guess I am good. I am going to make the piston out of hot glue and not quite sure what I am going to use for the sealing face but I am sure I have something laying around that will work. I also plan for my barrel to be half inch, what size tee should I use? The bigger the better i would assume.
If I don't use a spring do I need a bumper? I don't want a broken piston
I also don't understand how air is supposed to get past the piston of I don't make an equalization hole, and if I do, how big to make it. In the barrel sealing video tutorial he doesn't make an equalization hole.