What if you made a quilt to the dimensions of the incubator, but sewed into the seams at 4 blocks some "ribbon ties" or 2" fabric folded like binding? THEN, when it's placed over the incubator it cups the top so it won't slide, but then it can be used as a "regular" quilt when the babe comes home? Kinda like those fabric box/baskets turned upside down?