85g is a pretty standard weight for a fairway wood shaft. However, with those swingspeeds, I can see how you might do OK with the Graf Blue S, but I think the NV S would be to soft for you. You may be 'overloading' the shaft (ie it may not be recovering fast enough for your swing). Especially if you're not effected by bending feel (ie feeling like you have to wait for the shaft) then you may be 'dragging' the head through impact. Some video would help.

What happens with your 3w if you ease off a little, or try to smooth one out there? Better direction?

__________________
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For the record, I'm a club doctor, not a swing doctor.