Note, if a can motor belongs anywhere, it's in a tender. I've used a few and they are good at it.
Standard whistle relays and board triggers alike got made for can motor powered air whistles. A lighter assembly is nice on stub axles. These use less power and let more of the 5v boost get to the engine for a speed up vs slow down. (Works nicer on heavy pulls at loco or transformer limits) Same chime housing; offhand. Might be good for a bash onto a plain one. Most "T" shells have the ports opened or at least marked.
The early cast ones have beautifu detailing, esp. in the grabs and stantions. Even the slopebacks. Only a good valve train impresses me as much. My fav was actually a cast link & pin tender (# forgotten)
