Well, that is as long as there is a mech can be made to work and the engine is made in another scale! And ...Yes in near future through 3d printing we will have any boiler we want but for now.... Here is the first test using Hydro span 400 to shrink a N scale boiler to Z scale. Yes there are flaws and it was a a quick test. Primer was painted on the boiler to show the detail and the body was handled with the primer still wet. The shrinkage rate depends on the ratio of water to polymer mixed Uploaded with ImageShack.us Now on to shrinking an BLI HO TTT down to N scale..