[JensR]

Some unbelievable workmanship there.
The way you milled (engraved) and bent the brass cowling - wow!
Interesting way top offset the motors to allow central pivoting. This will lead to a slight difference in bogie/tandem loading due to torque left and right but probably not enough to cause problems.
In case the motors are not strong enough - I hear you can replace the motor with 380-sized motors, including the rather powerful Speed 400 from Graupner.