I dont know if brazing is possible on thin sheet, you'd have to heat it up a lot before you can braze surely and then in turn setting the wooden base it will sit on. I've not crossed this bridge yet but when i dont im sure brazing is out for sure.
Spot temperatures will be lower with eutectic brazing rather than welding though. Either way, it's going to warp unless you have heatsinks, massive fixtures, and a welding/brazing God.
I dont know if brazing is possible on thin sheet, you'd have to heat it up a lot before you can braze surely and then in turn setting the wooden base it will sit on. I've not crossed this bridge yet but when i dont im sure brazing is out for sure.