Full Battens
Full battens provide a larger roach that should improve performance.However, that aside, a full batten sail does not have any particular advantage over a partial full batten (top two battens full, bottom two battens partial) sail or a partial batten sail.I think the consensus is that partial full batten sails provide the best performance. This is because the full battens on top generate a larger roach, while the partial battens on the bottom permit better sail shape.Full battens will promote sail longevity, which is the primary reason people use them. Experience has shown they do not improve performance.One should also consider a loose foot versus a bolt rope foot. I personally am in the loose foot camp.I just ordered a loose footed full batten main from Catalina Direct that I think is a good value.