New main Radial or tape drive...?
I''m not sure about 2 full battens. I know some sails use two or more but I can''t remember seeing any in the fleets we race in recently. We change the tension on the top batten regularly between races if the wind speed changes, and I can see a certain amount of difficulty getting two set up correctly.
Do you use a hydraulic backstay? If so, I think the second batten would work against you.