I have to agree with Paddlefoot,
there's a lot work in making a stock. in that you are making it yourself for yourself, cost is of little concern. starting with a good blank,... "good" doesn't have to mean "fancy".... is far more worth the savings had buy an unstable piece of wood. I have spent a lifetime working wood, bot professionally and for myself, and can tell you that every time I overlooked some bad aspect of a piece of wood that was going into a nice project, it came back to bite me, in some manner or another. twisted wood.... any species.....whether considered a generally stable species, or not,.. is a headache just waiting to happen and will most likely continue to twist as time goes on,....it's just the nature of the beast. as said,...plain maple has lots of uses and it's just not expensive enough to settle for a piece that won't be pleasingly applicable to the use at hand.