I'm guessing your bore as 25mm and your pressure = 10 bar
So........ 50kg's of force divide that by 3 = 16.66kg's

You'd be able to flip/turn an opponent over but you'll not get any air time ..your also limited to a MAX leverage ratio of 3-1.

Have you managed to contact Trev?

BTW ..Your valve and tube/pipe sizes are fine.