just watch- if your wood is a little snakey- and you do a sraight split- you might have too much runout on the sides- if it is a relatively straight grained stave- it should be ok.
otherwise do a straight split, and if you are concerned about the runout, then back it with rawhide, linen or silk- to save the back- rawhide looks awesome and is nice and traditional- but linen and silk are real easy to work with
wayne