I feel ya DM. Been sailing the Nacra 5.2 and H16 and love the furling jib setups (self tacking would be even better).
Your sail would be more of a gennaker once installed. That design would be more usable on our boats, I think. There are a couple considerations.
First- we do not have the typical bridle setup, and there's no good way to add one. Next - there is a massive amount of mast bend on the TI (and some breaks I hear). Adding a removable backstay and permanent internal backing plates would be the way to go. It can be done, but Hobie's mast top does not make it easy.
Aesthetically, you also have to consider if you want to put cloth sails on the plastic boat. Maybe for testing. Plus the furling units are uber expensive.
Finally -No matter how you rig it, I believe you are going to need Hakas to sail it properly. May as well go ahead and make those.
So those are the challenges.
I too am pretty tired of waiting for Hobie to come up with a solution kit for this. The only positive sign is that a Hobie engineer flew a spinnaker in the Everglades Challenge this year and aced the race.
No word on when the company will make this available to his competition.