I love the whole range of Elmers engines, and as far as I know, all 52 of them.
For all those people wanting to get into making small engines, there is no easier way than making a few of what he had to offer, no need to spend megabucks buying plans and castings, and you will learn a lot more by following along and making a few of his, techniques are the be all and end all, get a few under your belt and you will soon realise that it is a good very starting apprenticeship.
John