Fabrizio:

I have two CA Eclipse, one with more than 150 flying hours and the other ready for his Maiden Flight. In both I used the original system provided by CAModels to retain the wings to the fuselage, i.e., wing tube and one butterfly bolt per wing.
For the Fantasy and the Eclipse is the same. It’s not necessary to put or use anything else.
My brother used the same for his Eclipse and every thing is OK after one year of continuous flights.

Best Regards,