I have been combing various sites (auctions, CL, etc) and think I stumbled on a CV1800 5HP dust cyclone from a hobby shop. The existing setup seems a bit funky i.e. optimized for space at hand, not performance. The cyclone is a large distance from the actual source machines and it is full level above machinery (woodshop is in basement, unit is located upstairs in garage). Current setup is direct vented so maybe that helps, but there is a large volume of piping (curves and bends) as well as modest uphill traverse for dust extraction. The first machine by my estimation is 40 - 50 feet from unit and the last machine is probably an additional 70 – 80 ft (with drops, bends in-between).
Long story short, aside from inefficient setup any additional concerns looking at a used unit i.e. motor stress, etc?