Coffee Appreciation

Agree with all this, especially the thermal stability of the PF, it's pretty much non-existent.

Was under the impression that the pumps were over quoted, said to produce 15 bar but only allowing 9 bar, maybe I have been misinformed. Also I was under the impression that the steam and brew temps were different but agreed that only having one boiler in a machine is rubbish.

I know what you mean about single boilers but in case anyone's reading and thinks the only good machine is a dual boiler, here's a brief expansion; If your machine has an actual boiler vessel with two settings for brew and steam then that's a better proposition, I'd assumed your machine was a thermoblock machine which just draws water from the reservoir and flash heats it as it passes over a piece of hot metal. Simple single boiler machines (like classic and silvia) can produce good coffee, they're just inconvenient for making more than a couple of milk drinks.

Heat exchanger (HX) machines and commercial lever machines also have a single boiler and can deliver both brew and steam temperatures simultaneously all day long.