I have a second C02 tank and regulator that I planned on hooking up for kegging soda. I pulled it out of the garage today to put inside the kegerator and noticed that the dial on the regulator wasn't functioning right. It seems that after we moved into this house that it may have got knocked around during the move. Well the PSI indicator backplate seems to have fell forward a little bit and the needle touches it around 18 psi and it doesn't move past that point. Can I pull this thing apart to push it back to allow the needle to move farther?