Well yesterday in school I thought about the filthy filter in Hoovers with the dual chamber bagless so I thought up an idea... Half dual cyclone,half twelve cyclone. It works by going through a dual cyclone chamber and then a twelve cyclone- minichamber* The pure air now goes through a micromaster* or hepahelper* filter. No filters are in the dirt and it keeps 99.8% of its airflow. When I finally try to convince my aunt to get a windtunnel, I will try this with the empower.
-a-
( *= a trademark I made up for the products I design)