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 so that when the side is removed from the sidebender, it is closer to, or dead-on, to the plantilla's shape and thereby reduce or eliminate the need to touchup the bends on an iron? Or is this just asking for trouble?
Any insights are appreciated!