After much debate I ended up with a 2 HP Shop Fox (I'll be upgrading to a cannister filter soon) and 4" PVC with aluminum blast gates. Aluminum blast gates were adapted with a rubber band for a rough seal and some trimmed screws to fit and provide a little rigidity. Flex hose is 4" clear line, I haven't finished running all the flex yet... I drilled and tapped a second pivot screw for the outlet of the collector so that it could be rotated (see photo) and reduce the bend. Chip collection is achieved with a garbage can cyclone. Set up works excellent, though I'll be happier with better filtration once I get a cannister on it...now I've just got to finish the collection box for my Table Saw and I'll be all set. Here's a few photos of the process for folks to take a look at.