I think you might be close to the mark re sp there Bazz.
I was thinking 14-20cps from Ismay to TD, 20-30cps upon confirmation of commercial flow rates. Then and a possible re-rating from there on reserve upgrades or PB4+. That will be a simple extralpolation of the reserves versus recovery costs factoring in the current gas spot price. All predicated on success of course...
Cheers,
-Disco