Reu this week, I installed a third floor. It supports two very heavy keyboards (Alesis and Yamaha EX5 QS8), plus a small board that supports a few things. A total of about 60kg. moved a little but it's stable trs, trs and pretty.
With only two floors, has folds to be one kind of big bttn pais of 1.20m long.
In short, it is more convenient and a nice RTX, but a little less stable.
I am satisfied.