I'm not sure if it's possible or not, but what if you put a button switch at the top of the helmet, under the padding or something that when triggered opens/closes the face plate, jaw and eventually back part ? This way, when you put it on, it closes around your head and it gets off the same way, just push the helmet on your head, it opens and you can remove it ? Of course it doesn't interfere with the ability to open and close the face plate when your helmet is on, but it would be a nice feature, wouldn't it ?