I just found the best dust/dirt run effect of all time!  It is the effect that comes with the LIC Bellanca Scout tundra tire version.  Absolutely amazing.  I have been using the dirt effect from one of the Nick's Dusty packages....but will be changing all of my planes over to use the dust/dirt effect from the LIC Bellance Scout tundra bird.  The name of the effect file is LICScoutdustrun.fx, so if you have the LIC Bellanca package installed...that's the dirt/dust effect you want to use on your planes.
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