I got a black Shutter and everytime I insert the tank, it leaks like crazy. I'll try and replace the 0 ring, but is there anything else I need to check? Maybe it's the hose (i don't use a remote coil), the metal ones never leaked on me, but this plastic one does.
If it is leaking from the microline you may have cut it bad or you may not have pushed it in far enough. Make sure you made a nice flat even cut on the hose.
If it is coming from the connectors of your microline then you dont have them screwed in enough OR you messed up your threading in the air source adaptor. I've had this happen to me. I was getting ready to go play and it started and i took off my co2 and the ref explained it to me and put a new air source and microline on it.