I was wondering whether anybody could help me? I can't quite figure out a few things.

In my stores is two pneumatic rams, a buffer tank, a trev reg and a solenoid.[*]The Trev reg and large Ram I don't know the sizes of. The ram has push fit studs in but has no particular markings, just red and the number 8. The port beneath, by deduction from the cylinder bore, should be 1/4.[*]The smaller ram definitely has a 1/8 with no studs.[*]The buffer I was told is built with a 3/8 stud in it.[*]The sol valve has 3/8 ports with no studs.

Secondly, what metric pipe would I use for each port, for high flow rate?

Thirdly,How on earth do you refill the paintball bottle?
Here's it so far, but it needs work