I ran in a couple of Millsky 75 diesels for a friend the Summer of 2006. Engines obtained from Carlson. One in great shape, the second had a stuck contra piston. A few years earlier I got a Russian Elfin iron and steel from Aerodyne. A good runner with no problems. I have a couple of Ian Russel Oliver Jaguar reproduction diesels. This .15 cu. in. or so diesel flys an 80 inch span Playboy Cabin. I tried to include a picture of the Jaguar mounted on the Playboy. Jack Hiner