Wow!  I never thought of the small rc helicopter parts.  Having looked into that, I found even smaller morors.  That was very helpful.   What I have found is that the rear tail motor is too bir and too noticeable for the models.  I'm curious as to what the gentleman from Japan used for the tail rotor. 

By the way Grendals.  Model Man Tom turned me to your LED videos.  Very helpful and informative!

Thanks for the help!

John