Looking at the props on the Du Bro balancer, note the cones/pieces that press onto the rod to grip the prop. Those can be used to grip a spinner or just a nose cone or back plate as well.

All props, spinners (nose cone and back plate) should be checked for balance. Doesnt matter who or how they are made. Every manufacturer can have an off day and produce some less than good stuff.
For example, I had a plane that came with an aluminum spinner and back plate. Because of the way the nose cone got attached I could check the balance of the two parts separately. The back plate was a machined part and was in balance. The spinner thou was a cast part and was out of balance big time. Used a Dremel to remove material inside the cone.
When balancing a nose and spinner together, like pictured above, mark the parts somehow so they can be put aligned and put together the same way every time. Otherwise it will be possible to put the spinner together and it be out of balance again.

Cheers.