I've had my MVP2 for a little over a month now, and it's been doing great. Until last night. Switched from a mini protank 2 to a Vision Vtox tank, and the MVP wouldn't read it, instead saying "non". I figured it was no big deal, I've dealt with that before, so I grabbed my little screwdriver and pulled the center pin up. Still reads "non". My other vtox tank reads just fine, as do my protanks. I plug on my iclear tanks, and it reads "0.0". I put my ego to 510 adapter onto my coolfire 2, and it fires the protanks, but with an extremely tight draw (my protanks have one of the air holes drilled out for better airflow), but also won't fire the vtox. It will fire one iclear tank but not the other. Move over to my old Ego battery, nothing but the protanks fires. Move over to my nemesis, the vtox tanks fire, and th eprotanks fire. Vtox is very tight, but protanks fire normal. I haven't tried the iclears on the nemesis yet. Anybody have any ideas?