Francois St-Germain wrote:

I think that both sections of the shaft are separatly
balanced by the outside counterweight I will try to
balance it by the same way from the rear and front.
I don't know if it will work but I have a good feeling
about it!
I do have the angle sensor I will try with your design
Thanks a lot!
Frank

At least one of the balance weights needs to be repositioned.
Both must be exactly opposite the rotor. If you set the e-shaft
up some how on perfectly horizontal knife edges so it is free to 
rotate you can then statically balance the assembly (e-shaft, rotor 
& balance weights) out side of the rotor and end housings. 

Paul Lamar
 
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