I'm Festool could offer the "CT-BP-5" a 5kg ballast plate for the bottom of the Midi to resolve that. Even offer them for 10% off when you mail Festool your old ballast (rock, random chunk of metal, etc) back too them.
[/quote]
There really is no issue in real life as far as the cyclone being top heavy as you have the midi in a static position when using the router, domino, kapex CMS etc. On the sys vac there is no issue apart from the fact that it does not have the same power as the CTs, it still does the job though. Peter Parfitt has done a test and there is not a massive loss in performance.
This is just another example of Festool covering themselves as the midi has smaller wheels and footprint, if you were moving it around it would be less stable but in my experience you push it with your hand on top of the cyclone anyway so have full control anyway