-MIKE- wrote in news:nacs4c$1s9$ snipped-for-privacy@dont-email.me:
I noticed something interesting flipping through my copy of Pocket Ref. (The reference book. It's not Puckdropper's Guide to the Face Off dot. :-)) The dump angle of most dry materials was at a minimum 35 degrees and quite often around 45. So, I agree that in dust collection slope is indeed irrelevent.
Puckdropper