Join Date: Jan 2008
When you purchase a regulator setup from GLA, you are not only paying for quality parts, but you are paying for service. Orlando provides great customer support/service.
However, if you want a cheaper route, but still get quality parts, you can assemble your own pressurized CO2 setup. In addition, you could get a regulator with a normal CGA320 nut and then an adapter that goes from CGA320 to paintball canisters. This way, in the future if you decide to upgrade to a larger (normal sized) cylinder, you can just remove the paintball adapter. Both myself and oldpunk78 have excellent articles (the link to them is stickied at the top of these forums; a link to my article can also be found in my signature).
As for your other questions, I cannot answer them directly since I have not used both of these products side by side.
However, I believe the GLA regulator measures the cylinder pressure (since it is a fixed delivery pressure regulator, as noted on the website).