Those 3 wheel dollys look cool, and priced well!
From what I know of FOG, people in the past have either:
1) Made their own stand, and set the MFT (collapsed) on top - which can retain the 900mm working height
2) Made a "sled", and put the MFT (legs deployed) on top - which raises the working height
3) Wished for collapsable wheels similar to the Triton workbenches