It's been a few months since I went out shooting. My marker was working great. I tore it down, cleaned and re-lubed it tonight in preparation for some weekend warrior stuff. During re-assembly I noticed that the gas line is a direct metal/metal connection to the valve, with no seal of any type. The marker is now leaking. I'm guessing at this time that it's from the gas line/valve connection. I tightened until it was snug (but not overtight), and did my best to verify the connection is straight. Do I need to tighten more?