I used to used this same stand, & know it looks horribly wobbly in his picture. In fact this was a very sturdy stand. What he has added is only extensions to the well secured legs. I wouldn't go this route but he says that it was tested.
Star San - Works (but not great) killing the mildew the accumulates around the shower grout. I would imagine that if you diluted it 5X stronger it would work close to as good at Tilex.
I think its main use is sanitizing dairy equipment.
What dilution do you guys use to take painted labels of...