Running Lime Rock on a 30 minute timed event with full chicanes with the M6GT3. I have adjusted the car using the David O'Reilly guide, can get specific if necessary. About 15 min into the race I have noticed that I am losing more and more rear traction, particularly on corner exit. I am using the Medium tires with stock pressures (22.5 psi I believe) and they seem to be in good shape at this point, but I need to check that closer. A friend of mine posited it could be fuel burn reducing the weight over the rear wheels, which seems plausible considering I start with just enough fuel to finish the race. Thoughts?