Where I go to play is also like 80% right turns and this is one reason I think a non-directional tire may suit me best,like a Michelin, so I can swap sides in between sessions without worries. Its just a matter of getting every dollar of tire life out of the tire investment IMO. It looks like your wear has gotten out of hand in your case lol! A 3500+lb car is going to eat tires like Wheaties man.