My new chassis build

[Talonmotorsport]

If you have some material spare say 2 bits about 200-300mm long prep and weld them in to a T shape. Allow to go cold and abuse it vigorously while clamped in a very good vice bolted to some thing very solid, your aiming for as much leaverage as you can find. If the weld comes away from the material looking like a steel scab it's naff and you need to turn the heat up, if there is enough penetration the material will tear around the welds if at all if using 2mm.