Squirrel, Get your stave to floor tiller first. The less wood you have to deal with the better.
Once at floor tiller clamp the handle area to the form(or work bench) with the back side down. Start heating the belly at the fades of one limb and as the wood gets hot enough start clamping it down. Work your way out that one limb then start on the other doing the same thing. Once it is all heated and clamped let it cool over night before removing the clamps and stressing it again. You may have to do this several times before you get the desired shape or straightness.