Thanks for that Eric, it is nice to know that people remember past efforts, and using it as a reference rather than building a full engine.
I am only just getting back into the swing of things in my shop and head, but If people ask the question, I am only too willing to give a blow by blow account, using extracts from the book or maybe with a few piccies of my own.
After the egg cup build, I will try to be a bit more informative.
Due to a backlog of orders I have to get ready four more finger engines (a slightly different design, but not much), so I don't think you will want to see those. but that won't matter as I will be going offline for about a month in the next week or so. But after that I have been asked for, and will be building a prototype three rotor turbine (for use in a model boat, and featuring proportional fwd/rev), that should be a very interesting build, and should be able to be made by someone with a lathe and a miller with an RT.
John