David,
Thank you for that. I do recall the diagram, I think, and will look when I am able to get to my PJR. In the meantime if any technowizard wishes to scan it and post it here, then that would be amazing to this technozero. (But not if that would have copyright implications!)
"Standing luff parrels coming back onto same batten with parrel balls" is not a very snappy title! How about Ager Loops?
Then the first question is: would the Ager loops provide sufficient of the function of the batten parrels? Clearly there would be an argument in favour of removing the batten parrels to reduce their drag on lifting or lowering the sail. Even with the batten parrels made in the slippery orange polyethelyne rope (7 mm ?) the drag is significant.
I did suggest to Robin that I might try initially to make Agar Loops using the slippery orange polyethelyne without the balls and rely on the slipperyness of the rope. Robin doubted that this would work.
However, is the polyethelyne slippery rope avaible in bigger diameters? I understand from Robin that it is not. Someone else may know differently.
I might do a trial initially with just the slippery orange rope to get some idea of what may happen. If so I would need an easy way of joining the slippery orange rope to form a loop; it is not easy to knot. I may lay the ends together and try joining with zip ties.
Interestingly, I am rapidly convincing myself of the merits of the current set up!
We shall see ...