I assume you haven't glued the wings on yet, that will make life a little easier. Doing one side should be really easy, when you flip the board over to do the other side you are going to have to build some sort of cradle for the curve to sit in so it can lay flat.
Right, the wings are not yet glued on. I hadn't thought about doing the taper before gluing the wings on, but now that you mention it, it may be easier. Though gluing them on after the radius might be a little more trouble some. And then there's the jig to hold the wing flat to consider.
I originally thought I'd do them after glue up, leave the neck through portion flat, and just raise the jig so that it wouldn't hit the center. Then there'd be that center flat portion to keep the body/neck level and true during clamping.
More thought is warranted on this.
