So really what you're trying to tell us is that it sucks! AF " ( Ever take a good whiff of the butt-end of a household vacuum cleaner, in operation ? Turn one on in a dark room with a flashlight shining at the exhaust. You will be revolted! ) " PS If in an emergency you have no source of compressed air, you could connect a hose to the spare tyre of your truck and use the air from that source. I remember very old Beetles used this method to power the windscreen wipers.
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