I know about Chris's free plans! He gave me a set and they sure look great.
My kids are not old enough yet but I'm still quite interested. Besides I have been wanting to build a boat for a long time. Maybe an F12 could fit the bill.

as chris puts it:
<quote>The other advantage of F12 is that as a new box rule the "best solution" is yet to be found </quote>
That is what I think will need to happen before "mass adoption (wouldn't that be nice!)" can happen.

I think the Optis are so popular because of the KISS principle (and no, I don't mean Dereck Kelsall's version).
I also think the rest of this topic deserves to be in the F12 forum BTW.