Those knots might cause you some grief. They're pretty big and smack in the middle of the billets. I always try to saw/split right through such knots, so they'll fall off when laying out a bow. However, if there are many knots, you can avoid only a few and not all of them. In those cases, it's best to have a knot smack in the middle of the bow's width rather then a little bit off centre.