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The only way I could afford a nice machine for home was to buy a non runner and do it up. You just figure it out as you go along. Self sufficiency wrt equipment maintenance is an underrated thing amongst coffee business owners. There’s always something needs mending, we’d never make a penny if we had to pay labour for breakdowns.
I’ve bathed stuff for days in cold solution when restoring machines without a problem, and left it in a hot machine for a full working day when doing an in-situ descale. I think the acidity weakens a lot when you start dissolving kilos of calcium into it.
Good excuse to show off my shiny pipes.