I wonder if is it possible to add subcategory to the upgrades system. I like to add several upgrades (specially for physics) and I'm sure this would be really usefull in order to add different subcategories to make all to be arranged. My idea is to add something like this: Code: UpgradeType="Engine" { SubUpgradeType="Flywheels" { Specific content... } } Some examples: Engine -Head -Startup timing -Exhaust -Turbo Transmission -Gearbox -Differential -Flywheel -Clutch Suspension -Springs -Dampers -Bump stops -Anti roll bars Wheels -Rims -Tires -Offset -Brake discs -Calipers etc...