Well, if you run out of adjustment, I've heard of lacing the bottom of the skirt to tighten it up, but that kind of trick doesn't usually show up till thousands of miles have passed.
What can I say. If either my champion flyer, or the B-17 had arrived looking like that, I think I might have sent it back.
__________________
Some people are like a Slinky ... not really good for anything, but you still can't help but smile when you shove them down the stairs.