I think part of the other problem is that pin over ring is not weak drilling; in fact, if you have an average PAP, it is one of the strongest drillings. While the Cherry is for medium-light oil, the Grape may be one of Hammer weaker balls, but, in reality it is a true medium oil ball.
It would have helped you to use a lower pin (a higher VAL angle) and a further pin-PAP distance to smooth out the reaction with the Vibes. Alternatively, you could just get a true mild, light oil ball, like a Tropical Breeze of an older Backlash which were weaker than the Vibes.
Of course, with your rev rate and ball speed, using the urethane Blue Hammer and playing a more outside line, you could tear that house apart.