39's at mid-o on q3's? Get on DOT's for the safety factor alone(I found Q2's to be unpredictable at the end of life, GPA's have a forgiving degradation as the siping wears off). Generator and warmers will let you get up to pace quicker; maximizing value of the track time. Over the winter, run the spring calculator; if something is off that is you starting point. If not, a suspension fluid change out would not be a bad idea along with other maintenance. Next, prepay for some tracktime....