Ryguy
If you are pinging 10s and suddenly you pick up a stronger ball (lower RG, probably stronger cover) and the 10 problem disappears, there is probably too much volume or too long of a pattern for the Fight to square up to the pocket quick enough with the high RG, especially if you have a long pin to PAP drill on the ball making the response time even later down the lane.
Many times when a ball is not "hooking" enough or hits like a wet towel, it is because there is not enough volume for the ball being used. In this case, sounds like we have the opposite problem.
I would venture to say that when the Lock starts to ping 10s because the ball is burning up, that would be the time the Fight would shine.