I don't want to rain on any parades, but...
While that table design certainly looks interesting, I'm left wondering how you're going to get the Kennedy space center concrete contractors to lay the slab in your new building (or got them to lay it in your old building). For that to work as drawn, there has to be precious little variation in the surface contours of the floor.
Unless you're going to put in some sort of adjustment mechanism for each caster, you either:
1.) will get casters that are floating above the floor and a surface that could teeter
![Confused :?](./images/smilies/icon_confused.gif)
, or
2.) will get a wavy work surface as the casters do conform to the floor, and so does the table top
Just some thoughts.
jtz