As I looked at the prints I have for the NYC Mohawk, I noticed that I don't have anything that shows where the tubes and flues are. However, this version is Lima-built, and it does mention that it's got (50) 2-1/4" tubes and (198) 3-1/2" flues, 20'-6" long. With this information, how could I accurately figure out where the they were placed in relation to the tube sheets? Did Lima use standard boiler designs, or was each boiler uniquely designed?