That hole is definitely drilled too high. The hole is supposed to be in a position where it will be below the paintball tanks o-ring when it's screwed together. That hole is there to make it easier to unscrew a pressurized regulator from the tank. Once you unscrew it to the point where the hole moves above the o-ring, the hole will vent all the pressure still in the regulator. That hole should have been drilled in the last part of the inside threaded area.
Last edited by RoyalFizbin; 08-27-2014 at 04:14 AM.