Haven't got the heavy metal yet, so went to kitchen got baking tray, and tried shaping aluminum. Gauge was only .025 thousanths. Going with .080. Found a welder willing to give me a bid when the shaping is done. Don't hold breath, probably will take a long time, but from what I found out this afternoon, looks like unless I break an arm, it's doable. The first part will be the undertank. If that's done, the rest is mere work.