Terribly. Those Oxy cylinders are expensive and hold SFA. There are 2 variants and only one of them has a regulator on the oxygen, the other just uses a valve which means over the ~5-7 minutes of use you get out of the bottle the mix keeps changing. They are an OEM version of the BernzoMatic unit and they get awful reviews from people trying to use them seriously.
I use a variant of this one : K075 - 1811167K Professional Oxyset Portable Brazing & Welding System Package Deal | Hare & Forbes Machineryhouse that I bought at Actrol years ago. It has proper regulators on both bottles with pressure gauges (its manufactured by "OxyTurbo" in Italy).
I use a Bunnings D sized oxy bottle with a CIG reg on the oxygen side. The Propylene lasts ok for my use. If I need to get on/in the roof I just use one of the disposable bottles with the original oxygen regulator, but at ~$45 for about 10 minutes use they are expensive.
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