Finally managed to corner Mike Mayhew, the news on those Waverley steam plants isn't all bad, and there's a fair chance they may re-appear. As I reported, MM fell out with the guy who was making the parts, after he'd delivered most of the components for the first batch. That's bad enough, but they also discovered a fairly major design flaw in the engine, which means that a Mk2 version is now being worked on. Mike tells me he's invested too much to drop the idea, he thinks he has a new machinist lined up, and is hopeful that he can have something up and running in a couple of months or so. When I get an update, I'll post it here, so watch this space.