Bonjour Mark,
I bought a first Microcosm plant to test him and the second one with this tug after a friend advised me he was very happy with his one.
I also am very satisfied of Microcosm (Jin) who is unfortunately for my French manufacturers much cheaper.
My only concerns are that he does not build cylindric valves steam engines to pilot them with only one servo like an Anton Jade for example and his boilers are small for 6,78 cm3 machines).
I have no remark about quality, the Stephenson reverses are like Saito ones (pressed sheets) when French ones are machined (but much more expensive).
He is very helpful and and has always answered to all my questions or my requests (examples, I bought him a double diaphragm gas regulator, he made fo me a dedicated water level to plug it :
https://www.youtube.com/watch?v=FCFkrRa-ilw and when I bought him a water pump, he made for me another dedicated one for my plant :
https://www.youtube.com/watch?v=WHyHEQi37Qs). Now, his boilers are planned to receive a pump.