Thanks to all, the 1/4" is what is in the thing now, albeit chromed
steel. I am not cooking small cows and large pigs, but a 6-lb chicken
comes out just fine. {grin}

In the interim, I also thought of aluminum as I think I may have
access to some 1/4" square too. Will check with neighbor and see what
he has.

Given any and all of the possible issues with brass, I will pass. If
the aluminum won't hold the weight at 400-F, I guess I will have to
buy some stainless. I was just trying to do it cheeeeep, {grin} free,
is always good.

Thanks again.