I wouldn't worry. After making the way clear (and, as noted, maintaining
pressure) for dust and chips on the way to the cyclone, it's only air you'll
want to move to the impeller. It's a fluid, not a solid.

"Joe Emenaker" wrote in message
om...

I'm taking so much of this as religion that my current dillema is
this. I'm also planning on building the home-made cyclone in
ShopNotes, but its outlet is at the top and the DC that it feeds into
is going to have its inlet either waist-high or at the floor. So, I'm
debating either raising the DC onto a platform or modifying the
cyclone design so that I can get a more-or-less straight shot across
from the cyclone exhaust to the DC intake.

- Joe