Excellent video Gil, I enjoyed it immensly.
I realise the vid is about the boiler and it is a great performer but the sipp engine and the duplex steam pump stole the show for my money
You have to be pleased with all those on show..
I am with you on this. A boiler looks and sounds about the same whether it is fired up or cool and sitting on a shelf. That is why I focused a lot on the the pump and the Sipp engine.