Thanks, again John. That basically confirms my visualization of your description from the earlier post on the Blackhawk MGB filter location. I can see how this setup would not be desirable for the S92 because of the potential for soilage of the passenger cabin. On the other hand I can also see that this setup turns the filter replacement into an inside job sheltered from the elements and that might be desirable in a field locale. Messy perhaps but away from the rain, snow, or sand. Makes a lot of sense for a military helo.