Swap back down to 42's or drop the needle back to 2... Depending on how high in the rpms that the over rich condition goes. Likely by the way it sounds, I'd drop to the 42 first. Also, for 45's, those are too big of mains imho. I like 163/165 with 45's. Might want to drop there first to see if it makes much difference on the low circuit. It will, though probably not enough. Those are good mains however, for running 42's in my experience.
Every 950 is different. Be patient.