No pressure on mine
Mine is a zero pressure damper type strut. I don't feel the need for any lift assist, or additional wear/tear on on the canopy assembly from pressure, but the zero pressure damper strut prevents blow overs and hard drops. Mine is liberated from an airliner overhead bin door. Since it was never on the original plans, its a builders choice item and never really called out for pressure rating. They sure beat the string that the plans call for !