Ive never tried yew but it seems like it would work as its a very resilient wood. However ive found it difficult to straighten arrows cut from seasoned lumber. I find that wood that is straightened when its green stays straighter than wood straightened when its seasoned, even with heat. I like to straighten natural shafts when they are green everyday for week after i cut them. If you look at wood arrows that you can buy from three rivers for instance, youll see that the arrows have some grain runoff, indicating that they aren’t cut along the grain but rather for straightness, the wood just happens to be very straight grained, and thats why you can cut excellent arrows from those boards. This is just my personal experience though.