Saturday September 13th 2025… Armstrong 500… Heinz bought his ex army Armstrong 500cc single into the workshop with a view to swapping its engine for one that had been stripped and blueprinted. By the time I first saw the bike which was around 10:45 the engine and been removed and other ancillary items were being removed from the frame so that normally inaccessible places could cleaned up and the rust removed where appropriate. Heinz and Mal were puzzling over how to remove the air filter box from its space in the frame, which seemed impossible. At first, no matter which way it was turned, it seemed trapped between the frame rails. When I returned to look at it later on, Mal had manage to free the air filter box but I don’t think anyone was quite sure how, except that it had been pulled forward into the space vacated by the engine. Armstrong 500 minus engine ready to be fettled and rebuilt Honda 650 Vigor… Mal did more work towards getting the bike ready f...