BTW, a lot of instructors now (especially BCU) are pretty firm about 'no loops that will allow your finger or hand to be trapped if the boat is rolled over'.

Here's a short article/blog on toggles and injuries:
http://victoriakayaker.blogspot.ca/2008/03/toggle-maddness.html

Somewhere I've seen a video clip with Leon Somme (BodyboatBlade with Shawna Franklin) comparing kayaks and commenting on the rigging/design. Perhaps from their 'Rescues' video?