It is a common issue with this pairing.
The 510 pin on the mod has been pushed down too far due to the long 510 pin on the TFV series of
tanks. (Actually it's due to the shallow 510 connection of the wismec/joyetech mods.)
You can open up the mod and try to push the 510 pin back up, it's not difficult to do unless you're using the rx 2/3.
Once its fixed, place a spare o ring under the
tank so it doesn't have to screw in all the way, pushing the 510 pin down again.
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