Ha, no I haven't, but I love the idea. If it was set up right the yards could be braced "square " athwartships so when you gybe the ringtail doesnt foul the backstay. The gaff/upper yard could be clipped onto the topping lift, its own halyard
or another line to control it while raising and lowering.
I would probably go a shallow triangular head
with the upper yard about a meter or so below the head
of the sail and made from something light and flexible inside a padded pocket in the sail.
Sounds like a fun sail to play with!
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