Thankx Yakaholic, and Thankx Hobie, for this forum!
I'd been thinking about running "X" of lines as a backup before emergency, but wanted to try it out before posting. I love your idea of stainless steel clips making it easier to rig and unrig the setup. Very elegant... The very real problem of the aka brace detaching is rare enough, yet real enough, that even a bit of "slop" in the lines would probably get you home (& not damage the amas and akas).
An intense multihull sailer told me of people lost at sea who saved $ by not replacing trampolines past their prime. I suggested a lattice of UV resistant rope underneath the tramp which couldn't be walked on, but yet would net a body attempting to fall thru. He didn't like the idea; I suspect it would clutter the crafts' sleek look...
We forum members are beta testing these AI's, and part of the reason I bought into Hobie is their reputation for integrity and continued product development. The rudder, mast mounting and paddle attachment have seen improvements from '07 to '08.
Ultimately, the aka brace problems also demand different engineering.
You can always rig up the crossed lines on shore before going out in really rough weather. Use Stainless Steel clips to make it easy to install and un-install the lines. If you turtle you still need to fold in one ama to right the boat, clips make that easier than untying knots.
Use lines as insurance against failure or as solution after a failure.
I have never experienced aka failure even after getting rolled over and dumped in the surf, but I usually avoid rough weather sailing.