Hi Dave,
That sounds like an interesting idea – it'll be great to hear, if you get to try it out! For single sheets it seems especially intriguing.
In the model testing for AUKLET's new rig, it's the double sheets that made the euphroes seem like the way to go. The mainsail (yawl rig) has double sheets in order to keep the cockpit clear. This is working out well, so far, in practice. On the model, when we tried the double sheets without euphroes – as in the more standard Western arrangement – all the extra line of the standard sheets did not inspire confidence when it came to gybing. All let out for broad reaching or running, all those long parts dragging across the cabin during a gybe made for a lot of snagging on the way. The euphroe arrangement really helps to keep that under control. The difference was so striking on the model that I completely let go of setting up the boat for the possibility of long main sheets running back and forth to blocks. But again, this especially had to do with the double sheets, and keeping the cockpit clear. Maybe this would also be relevant in sheeting a foresail with double sheets…
Cheers,
Shemaya