Thanks Rallyeman for the tips. I also just ordered a H3-3d and I am sure I will get better results than with the CM3000 (can't get worse). Now I just hope they take it back or I will also have to make a DYI handheld gimbal out of it.
Should have checked the forum prior to my purchase. No more Arris stuff. They cannot sell the CM3000 with an extended phantom mounting plate and then say it is not compatible...
EDIT: Got a reply from Hobby-Wing:
"It looks that it is too heavy for phantom to carry.
Some customer used the carbon fiber propeller, then there is almost no vibration.
So we really do not know which is a better for it.
If you could not get it working properly, you can return it to us."
I did try it with the balanced carbon fiber props. No difference. I am going to return it. What a waste of time. Waiting for my H3-3D gimbal to arrive...