The Aerodyne ground-plate cyclone (GPC) dust collector features cyclonic action initiated by a sloped spiral inlet and vortex reversal, accomplished by the use of a solid ground plate. This design provides a high-efficiency, compact unit that is available in horizontal or vertical configurations, says the manufacturer. The compact size is ideal for limited space as the GPC dust collector does not require a long, tapered body for effective dust separation. (800) 358-7546. DustCollectorHQ.com.