Please make the casters removable!
I recently did a demo on a 3520 that the club set up on casters. I am 5'8" and the 3520, had it been on the floor, would have been pretty high for me. Since it was on casters that added about 3" or 4", the spindle height was up around my chest. They searched around and found a box for me to stand on and due to the design I nearly fell off of it three or four times (the top of the box exceeded the dimensions of the sides so there was overhang). To say the least it was a miserable experience.
Do your demonstrators a favor and make the casters removable! Or get a the with adjustable legs (I know that Stubby and Robust have adjustable legs. I'm not sure about others).
Don Geiger