I was getting ready to do a final measure and cut for the ab to kidney section. I haven't seen specifics as to how this is supposed to fit your body. How tight should this be? Is there a certain amount of space you should have between the top of the ab and your chest area? Simply cut it to where it is comfortable, yet not excess gaps? I can probably cut my AP armor on the movie correct lines and have it fit, but I don't want to short myself.