I thought you said it had twist? Kidding.
If you are going with a flatbow, there isn't enough twist to worry a hair on your head (if you have any, that is). Whatcha got there is a pretty nice looking stave, ought crank out a zippy little dartshooter. If you are bothered by the little bit of twist you have, do like sailordad says and get 'er down to floor tiller stage, heat the worse section up until it's too hot to comfortably hold in your hand, and twist it gently with a pipewrench with padded jaws.