A low profile dust extractor for my StepCraft

The original dust extractor that can be added to the proxxon motor works nicely, all aluminum and stuff, but the exhaust can limit the movement of the X axis, which happened to me when I was trying to mill a MDF spoil board as large a possible, which force me to manually follow the mill with the vacuum.

So I designed myself a low profile exhaust adaptor that would not have that (perceived) flaw. I wanted to have the hose on the other side of the gantry, and also to be able to remove the exhaust as quickly as possible.
It should also have a smooth channel to keep it from jamming up with dust.

My design can be downloaded at grabcad.