These are beautiful! However, not all the pieces fit easily. I ended up buying two because I gave one for my parents’ anniversary. First one, the gears were not tight enough and they broke, so no more engine. The rod that goes thru the luggage rack doesn’t fit. I had the same issue with both. I had to use precision files to make the holes a little larger. The engine. Is a bit noisy. You recommended oil - which? Putting the larger pieces together, like the front was very hard because again, they ...