I've been to Rod Gray's Pellet Envy class in Overland Park, KS. I thought it was very informative and my results improved dramatically afterward.
There is no magic bullet that will automatically make you a Grand Champion, but seeing how a very successful team does it will certainly help improve your game. It will also give you an idea of how much attention to detail it takes to produce a consistently outstanding product, on time, every time.
Last time I checked, Pellet Envy was once again the number one KCBS team in the country.