Speaking of Air Filters, do you guys have any suggestions for running at the beach, desert, or river? I plan on running my GST in those kinds of environments and want to make sure I don't introduce dust/dirt/sand into the motor. I saw someone talking about putting a peice of panty hose over the stock filter.. Does someone make a pre-filter or replacement filter that would help with this kind of stuff, as the stock "sponge" would probably clog up pretty quick on it's own..

Thanks!