One thing that I noticed whilst looking inside it, the various components all seemed to fit together quite loosely.........Someone mentioned earlier in this thread that for a Cyclone to work properly , everything had to be completely airtight or the efficiency of the separation was compromised significantly.
I mentioned the fact that all the components were loose to the Festool Rep, but he said it was for ease of taking it apart for cleaning....?!!
Another thing that struck me was the transparent drop box. I made my own from ply and fitted it inside a Sys5 coz I had read that someone previously had tried to mount a Cyclone directly to a Systainer and when the vacuum was applied, it started to crush. The transparent drop box didnt look or feel any more structurally rigid than a Systainer, if anything it felt more flimsy.
These are just my observations, not criticisms as the unit obviously works as it was designed to do, but it has got me thinking that perhaps my own set up is far more heavy duty than it needed to be. I made my Dropbox out of 18mm ply and the weight of that along with the Dust Commander and a Sys5, is heavy in comparison with Festool's offering.