RotoDave,
Normally I'd agree with you about having the mass bias in your track for a control drill, but what I have found is, that the core plays a very big part in how much real control you have. With these "drier" lane balls, because the coverstocks are so mild the engine tends to take over, as the ball goes down the lane. Consequently, what is normally a control drill on medium and more aggressive balls becomes a flip drill on these type balls. Primarily because they get thru the heads so easily, everything gets saved for the backend! So, I've found using the pin over/under the ring, with the MB kicked out, gives you a much smoother and easier to read reaction.