I have owned a couple of the STS chassis, including one of the first, wish I still had one. From Jimmy : 57% rear, 57% Left, 51-53% cross. LF should be 20lbs heavier than RF, LR 35-37 lbs heavier than RR. Toe 1/8" out. Never raced them indoors but these weights will get you in the ballpark. Good Luck