Anyone know anything about the Ascot/Shadow 500 motor? It looks pretty compact in all dimensions except maybe height. It is cheaper than an NT650 motor yet very similar. Can this be easily converted to chain drive by pulling the angle drive? Any particular problems with them? I am wondering because there is one locally that I can get pretty cheap and am thinking of eventually building my own frame (stupid Foale book) and wanted to start looking for a good donor engine to build the bike around and wanted something different.