Not sure if I ever posted about this one, but I got one of the oil pump model kits off AliExpress a while back, and it is really awesome as a desk ornament. I bought it with plans to integrate into a layout, but the overall assembly is pretty nice, and I haven't had the heart yet. Probably when the motor goes out! Interestingly it uses the same general gear reduction set as Jin's higher detail version. I wonder if at some point Jin had intended to make a detailed brass version, or supplied this company with parts? Not sure, but a cool feature!