Not much has changed. It is looking like my ideal SW is between 335-340 from this experimentation.
The MgR stick was just too heavy at the time. But I always revisit heavier sticks now and then as I play with a more and more loose arm.
I plan to put 2 grams at 12 on each stick for now and go from there. I'll have them at 335 SW which swings really well on the Blades.