Grado with Unipivot - Which armwand?

Hi fellow members,

Recently I get a used 9" Morch UP4 yellow point (8 gr) as a second tonearm to my Gyrodec. Normally I'd prefer a green (4 gr) or red point (6 gr) but I didn't want to miss the thing. So, I currently have a Grado Reference Master MI cartridge running on SME V. According to Morch website, Grado cartridge gives best results on their green point arm; and Cartridge Resonance Evaluator on Vinyl Engine confirms this, though Red point seems better if the target is 10 Hz.

To confuse the things more, I read some users suggest the heaviest armwand Blue point (14 gr) to use with Grados. I get confused. In either way, 8 gr Morch seems a better option than 11 gr of SME V, but need your opinions.