On a recent show Tom Silva demostrated an adjustable height work table that included casters so that it could be moved in his garage-sized shop, two vises (one on the end and one on the side). He showed how the "Dogs" worked and how he could adjust the benchtop height.

It had metal contruction, so I don't think he built it.

Does anyone know the maker of this table and/or where I could purchase one?