Firstly the min and max stickers on some(all?) of the early Ram F8 sails into the market were put on in the wrong place. The stickers were placed too far into the sail and its very difficult or extreme downhaul is needed to get near the max mark.
Suggest first to check if your sails suffer this.
Next buy a streamline extension. The pullies line up perfectly and no problem to wind on downhaul.