I've got the setup
Steve showed in the picture (well, not
that one but one just like it).
Works great!
It's nicely portable and at my bench I built a 'monster cupholder' out of a couple of PVC fittings - a 4" cap plus a 3 - 4" adapter press fit into the top of the cap to make it taller (I did have to scrape a mold line out of the adapter to let the tank fit).