Share 'Making Forms for Fox/Universal Sidebender'

When I make a new form for my sidebender, I undersize it by the thickness of the sides, and usually have to touch up the bends on a hot iron. But I'm wondering if anyone exagerates the contours of the form, in the waist and at the ends, so as to minimize the "springback" effect, and if so, by how much? In otherwords, can the waist be made a little deeper, and can the ends be "undercut" somewhat s…