The motors I use are 12mm geard motor.I want to use this size because the
inside of the lower fuselage is very small space.If you use a vac-formed fuselage,you'll get no problem to use lager size of motors like studio model,but as for a resin casting fuselage,I think you'll need small diameter motors.
It took a lot of time to add the moving wings device.I can image how hard it was to design the armature and accomplish it.I really thank Jason for this and reasonable price.
I believe those are the female brass electrical contacts. You could make them out of some brass tubing by rounding the end. I'm sorry I do not know where to source an original part in this case. Maybe someone else does.