if you want to loosen it you have to turn it to the right (clockwise) try emailing them again I'm sure they will have some.i did i emailed them few days ago still nothing. For some reason the screw will get stuck and lefty tighty wont loosen it up. And i could see my self replacing whole 510 if i was handier with saldering iron
I rarely have to adjust mine, bought mine in sept of last year and it's still kickin strong.Still got my 2 spare pins as well, and yeah what everyone else said
I've seen people replace the connector on those mods with a fatdaddyvapes 510. It has a spring loaded pin and you only have to solder two wires. If your current plan doesn't work out it's a option worth considering. I've installed fdv 510's on both of my box mods and am very glad I did. Best box mod connector there is in my opinion. Good luck.