Thanks, Lucky!
If fully moved up, there is about 30cm clearance below the hood. In principle, one could increase this by another 10-20cm by shortening the aluminium bars, without loosing sturdiness. The arm can also be tilted out of the way towards the ceiling. I still have to mount some kind of bracket to the ceiling, though, as the whole thing is too heavy to be held just by the hinge.
There is practically no flex in forward-backward direction and about half an inch from left to right due to the hinge which holds the arm at the ceiling. I may have an idea for eliminating that, but anyhow the hood is large enough that there is not much danger of pushing it into the blade.
Best,
Michael
