Is the CG Smoker Pro an offset? If so, I have it's predicessor, the New Brunsfeld model. I used steel plates for my heat shield/baffle and the tuning plates. It works just fine. Shhet metal would not, I think, distribute the heat nor hold up as well.
I know I posted pics of the mods but I sure can't find them now. Good Luck!
Bo Compton in Mesa, AZ, KCBS CBJ
Weber Ranch Kettle, BDS Mega, OTS x 2, Weber Platinum
18.5 WSM w/Stacker from ProQ, 22.5 WSM, Reverse Flow Lang Clone 80 butt capacity mounted on 25 foot trailer with attached awnings
LFSA RED Thermapen,
And 1 2010 Victor brand Hot Dog Cart