Hi all, have been brewing about two years and have now taken the plunge and bought a cornelius keg after about 3 all grain brews. My question is what do I need to look for when looking for a regulator? I have a fair bit of experience with compressed air but not co2. Is it just that it is the correct fitment for the cylinder and has pressure in gauge and regulated pressure out gauge or am I missing something? Just thought I'd check before buying an expensive door stop. Thanks guys.