The double sheet bend approach
I use a single jib sheet, with a system I found in Good Old Boat. Here goes:At the clew: pass a short (12") line, lighter gauge than your jibsheet, through the cringle. Doesn't have to be attached: just doubled through the cringle. You'll use this line coming back from the clew to attach the sheet. Mark the sheet at the center point. In my case, I put half an inch of colored whipping about 6" from the center point on each side. But any marking system will do.Fold the sheet at the center point. Attach the short jib line to the sheet using a double sheet bend. The link shows you how to tie this knot. In the link's demo, the blue line is your jib sheet; the red is your short jib line. (In your case, the red line will be a double line, but everything else is the same.)Hope this helps. It works really well for me. If you find you like it, you can simplify by eye-splicing a single short line to the clew cringle, to replace the unattached doubled short line.