Was curious which one would be ideal for grappling and kickboxing classes with an occasional MMA fight here and there? Could you get away with the Hybrid or should i go with the Mega, and how close are the two in size comparison? If the Mega is NOT much bigger than i would just go with the Mega! What's the turnaround time on a mouthguard from biteme as well? Thanks guys, i know alot of discussion has been brought up lately about mouthguards and YES ive searched but havent really been able to answer my own questions.