"Morris Dovey" wrote in message
...

I'm fairly sure that my 2 HP motor isn't really. I run only a single
4" line and the whole setup is dedicated to the 'Bot. The very first
thing I did with it was to mill the entire 4x8 MDF table surface flat.
It took close to 3 hours with a 1/2" bit; and by the time it finished
the dust was so thick it was difficult to see all the way across the
shop. This setup was my first experience with dust collection - and
does a first class job.

??? That much dust in the air *with* a dust collector ???

-- Mark