Alright, so I'm building my first air rig for my new Daytona Gun (my original was prebought but since it used a dual reg it didn't function properly 100% of the time with my DG M4). Mashing together 2 different guides on CA.org I bought all my parts from Mcmaster but now have an issue. Basically my QD fitting doesn't screw in very deep into my 6mm tube adapter, I can get maybe one and a half revolutions in before it stops screwing. The guide did note the fact it wouldn't go in all the way, but I just don't feel comfortable with how little screwing I did (that sounded wrong). Anything I can do to screw it in more or is it good like this? I haven't applied any PTFE tape yet incase there is something I can do. Here's a pic for reference, and yes they're the same size (1/8") I have the male QD end screwed in as far as I can get it into the adapter and the female next to the other adapter for reference.