You have a 110 jib lapper which in a sense is a small genoa. Due to the deck, life lines and the path of sheet lines, it is impracticle for a larger genoa. What many fail to remember that the 26/260 have a larger mainsail than normal and if you take the total area of a standard main and a full jib or 100% jib, your boat has in essence a standard main and for lack of terms a genoa size of 135 to 140% genoa.
This boat has been proven to perform better sailing flatter faster as I use to say not heeling over more than 12-14 knots thru sail control, experience in sailing, knowledge of sailing area, etc.. I suggest then an A symmetrical spinnaker for lighter air. I use to race the 26/260 extensively.