I want to flip that around and ask how you got your Protank draw so tight! I love everything about my Protank except how airy the draw is!
Are you sure that the head doesn't need replacing?
I notice that when this happens on my Protanks then the draw is considerably tighter than it once was.
a needle or toothpick should do the job?
That mod is going to last about 3 seconds(after you drop your mod) the time to reach the floor. The 510 threading is already weak and has broken on many tanks. You just increased the odds 10 fold.
am thinking more about the protank upgrades, it has been launched for so long,
is it ever upgraded?