Hi!
If you disassemble your Bachmann or spectrum engine with the newer can motor for maintenance or so keep an eye on the black plastic plates which hold the motor. These plates have two or three studs in which the holes in the motor fit to hold it in place.
These studs can break of the plate easily if you use to much force to fit it all into the two frame halves.
They will break of and fall into the motor. This can cause the motor to block and damage.
Affected to this are all new can motors used in engines by Bachmann US and even FarishBachmann UK.
These studs are not very stable and can be mistreated actually when assembled in the factory the first time.
I just wanted to let you know that, so be careful!
Regards
Mathi