You did a gorgeous job on the locomotive and also your little steamer!! Absolutely beautiful workmanship!
My suggestion to you is that you join SACA, or the "Steam Automobile Club of America" They are actually currently running a series on building the "T. Hyler White Steam car of 1899"., using the original drawings.
Equally important, they have what they call the "Store Room" in which they stock drawings for Stanley Steam engines of various designs, other steam engine designs such as the Locomobile and Doble, many boiler designs from various eras, many steam car designs, and a LOT of other related drawings schematics, and steam appliances, such as steam automatic systems, fuel automatic systems, and water automatic systems. ("Automatics" are systems that monitor and control themselves. The Stanleys and others developed very elegant "automatics" that are entirely mechanical.) They also have more modern electrical "Automatics" for boiler, water, steam, and fuel control. The contributors to their site have been (and are still) some of the very top steam engineers of the last 100 years, and there are articles and monographs on nearly every steam subject you can think of.