In contrast, I admit to spending extra time and thought to make locomotives so they disassemble easily. The 4-12-2 comes apart with two screws, and soon I will rig it so that is true even with lead truck attached.
My articulateds, including the eight UP Challengers, all come apart with three screws - because a single screw at the cylinder block would go right through the drive shaft.
Sometimes simpler is way better - even if you have to forego petticoat stack detail.