Congratulations on the NC 895. Our locale dealer is offering a roof rack system (Yakima brand) that would attach to the NC 895 roof's side rail. I am interested in mounting a kayak to the cross bars of this system and I too question the roof's structural integrity. I asked our dealer this question and have not heard back. Maybe you could also ask your dealer the same question.
I got a picture of the Yakama rack installed on an 895 at the boat show. We are definitely interested in this setup. I think they called it the Adventure package. It also came with a solar panel. See pictures below.