Hi from America 🇺🇸 and the UNION PACIFIC 4017 "BIG BOY" 4-8-8-4 ARTICULATED MALLET built in 1941. 4014 was sitting in the museum near Los Angeles, California for 62 YEARS!!!!! And successfully rebuilt during 5 years in time for the 150th Anniversary of the Transcontinental Railroad, and the GOLD SPIKE in Promontory, Utah on May 10, 1869. 4014 was Rebuilt with 100% New parts that was constructed in the Roundhouse in Cheyenne, Wyoming. And converted from Coal into the oil burner🔥!! Thus: Japan can Easily build the brand new group of 30 to 40 New S.L.!! The 4-6-4, class "C"!! WITH new Improvements like: (Listed in Random order:) (1): 4-6-4, with Large driving wheels for speed and up to 70 m.p.h. With heavy weight to pull 💪 up to 10 to 12 coaches; and distribute the weight to run on both Mainline, and shortline at 30 m.p.h. (2): Belpaire firebox with Square ⬛ corners, for ease of construction; and ease of replacement, by using the Modular system to separate the round boiler and each module will be replaced at the regular maintenance intervals. (3): "BOX-SPOK" driver wheels Complete with flanges, because this will eliminate the long time ⌛ of using the old Blacksmith era of changing the separate steel tires with the "Ring of Fire 🔥 " technique. Simply exchange the complete wheel and flange together. (4): "BAKER-PILLIOD" valve gear with the pre-cast steel Expansion Link; because the usual "Walschaerts " valve has the Curve ) link that has to be machined on a highly accurate lathe!! And the BAKER-PILLIOD link is pre-cast steel and only needs the last finnishing machine work. (5): TIMKEN (T.M.) ROLLER BEARINGS on the axles to permit long life in running at fast speeds of 70 m.p.h.!! (Or perhaps the Roller Bearings that Japan now uses. (6): Roundhouse-to-Roundhouse, with each building having a Turntable; or another different turning track like a Triangle 🔺️, or the semi- circular "Balloon 🎈" loop that allows the full passenger train to turn around ; like if the West-ward 4-6-4 turned around into the East-ward return journey!! Also: the new 4-6-4 can have a Special Streamline case to resemble many other famous s.l. in the 1930's "ART-DECO" era!! These are only a few suggestions. Hopefully you will like them. Please answer with Positive comments!! Thank you from America 🇺🇸 🙏 ❤!! Sunday, March 24, 2024A.D. Mr. Steven Solway. America ✝️ 🇺🇲 🌎 ❤😊!!!!!