I've been welding 20mm track mounting plates for the last couple of days see attached picture. I tack the two 20mm plates together and make the mounts back to back and weld them alternative sides to try a prevent them from warping leave them to cool then split them but theyre still curling in at the sides which the customer is complaining about anybody any advice on how to prevent this are fox it when it does?? Thanks in advance for any replies great forum by the way. CT