I got to the clutch rotor assembly but stuck on how to get it off, not to damage it!

Hi,
Requires you to block the engine from spinning by taking out plug, inserting a loop of rope 2-3 inches long, spinning to wedge piston from spinning. Take a T-20 torx driver and insert it where the driveshaft went and turning counterclockwise (going from memory on the driver size - could be a T-25.)
Peace,
Clarke