What do u mean postive pin connection? My battery is perfectly snug it just won't fire
I discovered after getting my Fuhattan that a snug battery does not each a connection with the atomizer.
The bit of copper in the top cap of the mod that makes contact with the positive end of the battery is not fixed in position. It is about a quarter inch long and moves. It is snug, but it does move. Mine came with an extra one in the box.
The one in my top cap takes a bit of pressure to move but you can push it into the top cap completely so that none of it protrudes out below the cap. If your atomizer is not sitting flush on the cap, just screw it in harder and it will push out the pin until the atomizer is flush. If the atomizer is flush, push in the pin until you can't push it anymore which means it is in contact with the positive pin on the atomizer.
If you already have everything together and the atomizer is flush with the cap, just push hard on the button and you'll feel a bit of a pop and everything will work fine after that. The pop is the pin in the cap moving suddenly because of the pressure on the switch transmitted through the magnets and battery forcing it up suddenly after it starts moving.
I use a flat top LG HE2 and it rattles in the mod because of the extra space inside. All of this is a big reason why I don't really use mine very often opting instead for my Apollo when I use a mech.
Not saying that this is your issue, but given my experience my Fuhattan, I think it's a good possibility.