I agree with Yakaholic on this.
Surely Hobie could provide a simple type bayonet plug that is able to be retro fitted?
Even if its just a glue-in type. (I understand why they would be reluctant to go for the thread cutting retro solution with the thin seat plug hole walls)
If not then I like the idea of filing the threads off and glueing/siliconing it in, so a Part# would be great Matt!
I've just used the new system on our friends 2012 TI and it is what was needed from the start. The seat is simple to fit and remains in place.
They are not the same size as the standard threaded anchor point fittings. They are much smaller.
From what I could tell the seat post holes on the 2012's look to be the standard size as all Hobie seat post holes so filing the newer inserts threads should work.
The 2012 model should have the new seat peg fittings.