Drilled and tapped the holes in the buffer tank and got all the pneumatic parts put together today.

Current problem is that the ram goes up very slowly. Am I doing something obviously wrong? I'm worried the flow rate through the valve is too low.

If I remove the ram from the system and connect the ram up to with 2 closed burkets and leave one port open the piston moves up and down with ease. However if I now plug a 3rd burket into the open port and open the valve I can push the ram down but it is stiff. Am I getting a normal amount of flow through my burkets?

Cheers. Video attached.