if someone knows how to write GS codes, you could turn the max speed tester so that the tires dont spin, but MPH and RPM and stuff is affected. That way the car doesnt move (as if on a dyno) then you just pause and exit when you want to quit...or make circle into 'race end' so that you save your max speeds in the list...now all I need is someone to write it for me...any takers?!