I kind of like the idea of changing the location of the flat spring, so it is under the draw bar and on top of the horizontal support. But, all of this stuff is held together with a single rivet, and I hate to take the shell off to drill that rivet out, flip the spring, and put a new rivet in. (The engine has two very tiny screws on the sides of the boiler, that look like they might be trouble.
No way I would go through the trouble of drilling that rivet out over replacing the truck. As for disassembly, take a look at the service documents Olsen's kindly hosts for your locomotive: