I realize that there is a place for extra propellers on one side of the Styrofoam lid that the propellers fall out of every time you open it.What is the other side for? And what would be the best thing to keep all of them in the top lid? I found some Velcro in the bottom when i received the H and every time I install it to keep the props in it comes out with the props. If you have some pictures of what you did to keep this from happening, that would be great also. Any help would be appreciated. Thanks in advance.