That looks great... I've seen some good setups.. a guy in the states sent me pics of his when I was setting mine up.. he had a 5' Fish tank which was awesome.
I experimented with a piece of 12" galvanised chimney, that I hung the parts in vertically, and hooked up a wallpaper steamer to the side of. I was hoping to combine the rusting and 'boiling' into one unit that didn't take ages to boil like the tank I was using.... it didn't work. The rusting was aggressive at the bottom where I sat the acid, and it didn't really steam that good either. I think it would work with a much larger chamber, well sealed.