Empire megalite Burst Disc

I have an empire megalite 68/4500 with standard regulator. Used less than 10 times with Etha 3 and just had my second burst. Should I keep replacing the disc, or get a new reg, or does something need rebuilding in the reg or asa, or should I just get a ninja tank with whatever reg it comes with. Still new to the sport so figuring out what gear works. The seller I got the tank from said he never used it. The first burst happened my first shot at the chrono so the field owner replaced it quickly. Yesterday it happened during a tournament and I was already pissed enough so I can’t have that happen again