Pneumatic questions, sorry!

[Liftoff]

My preferred solution is a 5/2 way valve operated system with QEV, buffer tank and spring/bungee return. I use all paintball parts for the reason that they are readily available, not expensive and properly rated. Buffer tank and main tank I'd use 12oz tanks, paintball low press regs are available as well, and they connect directly to the tank so there's no hassling with adaptors. 16bar is a bit on the high side to find LP valves and push fittings rated at that pressure.
The thing you should really take care of is making sure there are no restrictions from the buffer to the ram, that will be the difference between a flipper and a lifter!