A typical Soda Stream cylinder can only carbonate up to 60L and will cost about $20 per fill. So given these figures the larger cylinder and this hose will pay itself off once you fill the 2.6kg gas cylinder once. It's a no brainer! 

This particular model has a quick disconnect feature on the inlet side of the Terra/Art/Duo fitting.

This means you only need to drill a 19mm hole without undoing any threaded fittings.

Because of this feature, we have removed the gauge in order to stay competitive in the market.

In order to do a leak test it will be the exact same procedure. But to identify if you have a leak after a few ours of having the system off. You'll simply push the carbonate button/lever on your Sodastream machine. If you hear gas spurt, you do not have a leak.