I'm new to mechanicals and have a problem with my Chimbus not contacting with my mech. I screw it down flush but it wont contact or fire. Do I push down the center post on the rba? looking at the bottom of the post with 510 threads there's a plastic insulator and the center has a flat head screwdriver slot. I have tried to delicately screw the center post out and it won't budge. From the top deck the center post is raised above the other 2 posts with the plastic insulator showing. I have tried to delicately push it down and it won't budge. So my question is how do I get contact? My mech is a cheap aluminum threaded device I'm using for another week or so until I receive a better one. The top cap is pressure fitted and I don't believe it should be fiddled with or It will almost defiantly break. It's the aluminum Private V2 from F.T. Any help is appreciated.