I came across this flickr photo stream from a guy who owns (or works at) a Vespa shop. I'm not sure exactly where he is, but it looks like he's in the US. Whoever he is, from the looks of his photos, he's a really good tech. He's got a lot of really nice photos detailing a rebuild of a really old (first year) 1952 Vespa Allstate motor. Those old wide-body motors are pretty archaic, and are set up a bit differently than the later rotary valve motors. When you see them from the inside, you realise how utterly basic they really are. Nevertheless, there are a few tricks to working on them, and it is nice to see someone go to the trouble of taking photos of many of the steps of the rebuild. Kudos!