splitting at the crotch ,, would probably give a pretty challenging twist to the stave,,thats why some are suggesting splice billets,, that would probably make a better bow and longer,, with higher chance of success,,sometimes splitting in a twisted grain, ,will make checks or splinter the wood so it is hard to use,, or not be used at all,, its a risk,, cutting at the red line is a more sure deal,, that being said,, making a wood bow is never a sure deal,,, you just do your best and hope it will sling an arrow,,