I got a newbie question about regulators and nitrox. I am about to buy scuba equipement for the first time and I soon want to move on to nitrox. I am looking at the Titan LX regulator which says its capatable with nitrox. My question is can I use this first/second stage both with a regular tank and a nitrox tank without doing anything special but screwing it on another tank? Or would I have to buy another regulator for when I dive nitrox? Thanks.