The system Andy is running doesnt have any small bore pipes in it. The connection between the bottle, valve and buffertank is a solid ali bullet, finned for more heat exchange surface.
The smallest bore after the flow restrictor/liquid stopper is 13mm.
The flow restrictor between bottle and collector stops any liquid CO2 entering the system.
The flow is the reason for the chilling, and restrict that flow you degenerate that system from powerfull into mediocre.
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