[craggle]

That's a shame. When I brought mine there was the option of mild steel and aluminium with or without the Explosafe.

I went with the steel version as I have had experiences of aluminium water tanks splitting in busses due to vibration. (one of my past jobs)

As someone who has tried welding thin aluminium sheet I can say it is extremely difficult and the slightest imperfection or speck of dirt on the material or filler rod will create a hole in the weld. Most of these can't been seen but only show up once filled with liquid and allowed to sit for a while.

Craig.