I have been trying to think of a good way toI have been trying to think of a good way to operate the air valves, I just really don't like how the MSD and Mercdog designs are. This this is what I have come up with.
For sealing, at first I thought I had closer tolerances on the slider assembly,
but after duburring the inside, they are a lot further than I had thought, so now I have to derive some sort of seal for it, I am thinking I can probably do a cap with an o-ring in side, and silicon that to the outer slide tube.