The Festool has some serious air velocity and vacuum so it can easily move the necessary amount of air.
A dust head is best in that it achieves the best possible air quality by removing the swarf/dust immediately.
Maintaining negative pressure on the enclosure will also provide a safe air experience, just remember to vacuum up the swarf/dust that is visible.
Regardless, be sure to allow the vacuum to run for a few minutes after a job finishes to ensure the enclosure is cleared.
What you need is to make a hole in the side or back of the enclosure - or the front if you like the @FlatBaller method. An adapter for you hose and your there.
My Festool uses the 50 mm tubing so I cut a hole in my enclosure and mounted this on the outside:
http://www.amazon.com/gp/product/B003OCAY66?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
and this is on the inside (but I’m using a dust head).
http://www.amazon.com/gp/product/B00AX5I8VA?psc=1&redirect=true&ref_=oh_aui_detailpage_o07_s00
Here you can see how I did it. This is my custom enclosure but using the Nomad enclosure works exactly the same.
They are caulked and screwed in.
For the Nomad, one could just use the D4236, cutting it down to match your tubing.
If the vacuum is making too much noise, consider adding more holes - but only enough to maintain the negative pressure. My experience is that the Nomad enclosure is pretty leaky so I don’t expect that to be necessary.
I use simulation extensively and I have sufficient experience that I don’t feel I need to see things as they move plus I want the fastest, best and safest form of particle removal. YMMV.
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