This discussion has moved quite aways from HydraNet vs Laminated sails, but I noted a mention of "hay racks".
I love hay racks, and have had them on both of my trimarans. 3 on each side is ideal, and the lazy jacks come out the ends of the hay racks. While I am a fan of sail bags on cruising boats, I use a traditional sail cover on my race boat. Important for myself and crew to adjust the outhaul; and this is harder to do with a sail bag. I also "retract" my lazy jacks after dropping the sail, to enable the sail cover to go over easier.