When looking at the paper tune on the GT800, I am not seeing a consistant patern. Only thing that seems somewhat consistant is that the nock point is too low. This leeds me to believe that there may be some type of form problem, or contact issue.
This time I tried paper tuning without any sucess so at the end my last solution was to switch my WB to my old QT800...and the miracle occured : perfect tear !!
I would not consider this a perfect tear.