We have a very long nozzle connected to our air compressor,thanks for a possible option if we did not have the extensions.Hello....this is a air nozzle that I rigged up to clean the horshoe area. It is an air gun with the tip removed and a compression fitting and a 20 inch piece of brake line. The line is soft enough to bend as needed. I was able to drill a very small hole, quarter inch and then seal it with a bit of high temp silicone. I would think since you upgraded to the higher cfm blower you should be able to have your air wash opened to at least 50%. I have my air wash open 2 inches. It keeps an area completly clean and the rest get dirty. It's just something I have learned to live with. I have yet to put in the bigger blower. I have tweaked mine to run perfectly with the smaller one.The dusty black residue doesn't sound good at all.View attachment 154733