If it looks like the original, it will warp too - even with a heavier material. It's the design that is causing the problem. The warp issue is due to the way the metal is cut and bent - no support at the breaks to stop it from warping.Sent an email to rec tec on Monday and received a new heat deflector yesterday.
Seems like the new might be a bit heavier.
Have to compare when I cook this weekend.