>>6712975And this is what the head looks like with no headmaster inside. A Headmaster is 100% required to use the super mode head, as the helmet doesn't even touch the neck joint (aside from during headmaster-less storage) and the neck joint can't turn on its own.
I think PE should have included a filler piece to use if you don't have a headmaster for this helmet. It's not really a problem since I sincerely doubt anyone would ever own this without a headmaster to at least use in a pinch, but it would have been nice.