That video is terrifying! I know nothing of the type, and now know more than I want to. But yes, for my experience, the C of G position of the plane will greatly affect spin recovery - something which you may not come to understand until you enter a spin. If there was an error in the C of G specifications for the type, that's bad. In the mean time, routine weights and in particular, empty C of G position calculations are one of the most frequently buggered up things I encounter when reviewing information about specific planes. I find a stand back and look twice sanity check very worthwhile for new W&B documents.