Ahoy folks! After years of getting startled by the roar of venting CO2 at the fill station, I finally decided to do something about it. I bought a high-flow/high-pressure muffler (Mcmaster-Carr part 4440K122), and installed it on the local club's fill station. The result is quite remarkable: View: https://youtu.be/fE9wtISFapM
....And that tree hanger is totally awesome! Great idea and it eliminates special bottles with dip tubes.