Looking for some set-up help

[Robert Cromwell]

Wolfenstark: The ProTank does fit on my mod, and has been working great with the coil that it came with. Somehow though, the replacement coils don't fit. There is zero-suction, at all, when I try to use the new coils.

Short stem heads for Evods? I think the protank uses a long stem head.

also I think you have to use a different base to convert a protank from single to dual coil heads. So there must be a difference.