Gary & David,
wow, didn't know that David and I were "trailblazers".  Seems more like "old Geezers" 
 
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Gary, I've seen a lot of action photography and David's has always been high on my list of "gee, I wish I was that good".  But what has always impressed me is his marketing skill:  he knows both what and how people buy and he has created his sales system to maximize that.  Action photography is a tough game and those that do it well get my complete admiration.  The willingness of David to share -- as well as Jim Poor and Julie Poole and others -- is what makes this forum one I return to every day.
Good luck and please share your event report complete with pics.
Jim