Also something was said about cracked tang screw holes....using a jig I can see this being a problem because you could force the metal to move before it is ready especially since the jig is sucking the heat out quickly so care must be taken. By heating and bending with the vise grips we used very little pressure because the bend didn't happen until the metal was in a plastic state therefore a smooth stress free bend. You can control where you want the bend to occur simply by heating the needed area.