Hi guys. I just received a 68 classic in trades. Its my first mag. When I hook c02 up to it it gushes air down the barrel. Not a small leak but huge. I watched Tom kayes video on YouTube so I ordered a repair kit and should be here in a couple days. I was just wondering if there was something else I could check in the mean time? All the orings look good in a valve and on off as well.