I dont know of any Scotty, I have always gone by the service manuals and have rebuild at least 10-15 of them over the years and zero problems. I dont ever forsee a book coming into existance either as the engines are cheap and most see as a throw away engine and just buy another used one VS rebuilding what they have. The 3800 community just seems too small yet and the engine is great in stock form. There is a lot of tech stuff about engine stuff on 3800pro as there is a section for lots of various engine tech and some of the guys from down under chime in now and then so you get a larger variety of info and what is available outside of the US