nd88, I didn't see a major difference in filter life (after changing the air intake). However I haven't plugged a filter in one day either. I do notice that the filter runs longer when there is no wind or it blows so as the dust exiting the machine is not sucked back in the rotating screen. I think a better precleaner may extend filter life or an option of switching the intake to the windward side of the combine (switchable from inside the cab)may eliminate some problems.