A stach is not a "nice to have" or "need to have", but a total "I would die if I did not have...." You clearly understand the importance of a stash - for every inch you use, you need to buy at least (the very least) a fat quarter replacement. While you are at it, you might as well get something in blue, or yellow, or red, or just because it is very pretty. Welcome to the sea of stash - go with the flow.