Congratulations! You have a great display set. Only one more 652 is needed, they show up from time to time and they are more plentiful than the 653 and 654.
By the way, if you want the correct track to display the 1946 engine it is the Gilbert track with the web under the railhead painted black. It was made only in 1946 so it is not common and usually found mixed in with the later all steel track.
