I could save some wobbly and leaking connectors by taking apart and shoving an o-ring under the insulator in the (far) past, but would trust manually adjustable pins much more.

My very first reg. squonker (an Aleader box) had the same problem, it worked just fine for 2 weeks with the same RDA, the moment I changed the atty on it for an other which had probably a longer pin, i felt a slight "crack" and from that point, most of my attys didn't want to make contact with it any-more. I just simply desisted with reg. squonkers for the future. (as i could never put my mind for soldering... de-soldering for to take it apart)

If you can make a break down and some photos about your connector, maybe it'd be a help (for to help)