I love the portability and power in this compact unit but get tired of having to clean the filter for small-scale wood working in an apartment. (Model WD40500). I've been reading some interesting things about cyclone pre-separators and found the optimal dimensions of the device are dictated by the air flow. Somewhere I saw a little 6" diameter thing you pop into the top of a sealed 5gal bucket for 1 1/4" hose. If I used 2" I.D. hose or PVC pipe throughout, what kind of air flow would this unit produce on a clean filter? I don't want a simple chip remover... If it's designed properly the cyclone effect can remove tiny particles enough to keep standard air filters clean for months... or so I'm told.