We use Sailrite kits (at least the cut panels) to make Isotope sails, including pin-top and square-top pentex mainsails. So, Sailrite does have some familiarity with designing fully-battened mains for catamarans. The Sailrite cut is fuller (more camber) than other designs, and necessitated some trim changes (mostly downhaul and mast rotation). It is performing well against North and Smyth sails.

My mainsail doesn't have reef points, but we did put a couple on JP's main for the North Carolina Challenge.

I hope that helps,
Eric