A friend of mine sent me a yew stave from Wa State. I took the bark off tonight and sanded down to the white sapwood. There are small cracks in the sapwood, some about 1"-2" long. I tried to figure out a way to work around them, but can't find a clear path up the stave. Should I remove with my draw knife sapwood to see how far the crack goes? Or is small hair cracks in the grain nothing to worry about? Or should the back be clear of all hair line cracks or cracks period?