[christyf5]

Ok so I thought the needle valve on my old regulator was going down the tubes as it kept turning itself off. I bought a new one and replaced it. However the new one is doing exactly the same. Upon inspection of both (they're exactly the same), I've noticed that there are two "screws" with a washer in between that seem to have no discernable function (to my knowledge) these are just above the black knob that regulates the CO2. As well, on the knob itself there is a tiny spot for maybe a hex or allen key to fit into. Are these important? I can't find a key small enough to fit this spot. My previous reactor was the "set it and forget it" type, this new one is proving to have a difficult "set it" process.

Anyone care to enlighten me?