I don't feel comfortable cramming more than the Huge warhead into the current model, it feels over powered for what the object is. My personal thoughts is if bigger explosions are wanted i should be using reactor components in a thermonuclear warhead. If i go that route i will probably look towards creating a custom model for it (probably a 3x3x3 block only in large).
Any feedback on this would be helpful and i will see what i can do