The picture above shows what I am going to try for the jib sheet fairlead on the boat. Alan suggested that the fixed bullseye sheet leads shown on the plans may not be in the ideal position for all situations. This is my idea for an adjustable sheet lead.
The brass parts are actually a Classic Marine “dinghy gooseneck” with the “spike” removed and a large shackle attaching a single tufnol block has been added to the assembly. I suppose one of those nifty springs would keep the whole deal from falling over when the sheet goes slack. I’ll also add a wooden base with nice ends so I don’t stub my toes on the exposed track.