Hi Area 10,
just wondering if you've tried this Greenough fin from the True Ames range?
Looks similar to your Squirrel cutaway fin
www.trueames.com/collections/all/products/george-greenough-stage-6-single-finIt comes in a 9.75", so would possibly be suitable as a downwind fin for a 14x26 Javelin?
After my latest downwinder with DJ last weekend I'm thinking that part of my problems are fin related (nothing wrong with my skill level of course...!!!), in using a longer base Candice Appleby fin.
So I'm contemplating the leap of faith as you suggest and buying direct from TA (maybe one of each), or alternatively I can buy a Naish fin like DJ is holding in the photo above.
Thoughts?