Fabricating a shifter console

I'm in the middle of welding in new floors in my 1963 Valiant convert and ideas started popping into my head while I had the welder out. I figured all this practice welding, I can probably make a console. I was going to just use flat sides and top as I hadn't thought about how to make a curve. Seeing your pics, its all clear now. What gauge sheet did you use?

Sides are 16ga and top is 18ga. I used 1/8” material to make the trim rings. These are critical because when welding sheetmetal it shrinks and warps very easily. Small tacks and let them cool between welds. I used my air wand to speed the process.