Originally Posted by YeloSno
but you should look to at least drilling a small hole about half an inch from the butt end of the ASA.
Helps it vent the ASA so it becomes easier to unscrew faster, but won't make it leak from being to close to the airy area, if you know what I mean.
No offense intended, but I can't recommend drilling into any part of your marker. If you're concerned about unscrewing your tank, and dry firing it isn't helping you get it off, then bring it into your local pro shop. When you're there, talk to them about setting you up with an on/off ASA. I'm just giving you this information based on what I'm guessing is your current level of experience with your paintball gun. If you're having issues and you're not confident then don't go to town, that's how things break. If you have a good local shop, they'll take care of you. Happy customers equal better business.