What size buffer - You need atleast 3X the volume of the rams in a robot...industry use 5x but 3 is enough for a robot.

What valve = Bigger is always better in turbulence I have a highflow valve that came from EWE 2..Flowrate even went as big as to use a 1/2 valve in a feather.

Reg...umm Woody would be best to answer that?

what size bottle = Most people in the UK use 600g of co2 witch should last 5mins easily.

Dave moulds
Team Turbine