OP
Thanks for the various comments. Was mostly interested by the fact that JJ's book didn't really make much of a distinction about minimum/usable gas, whereas Fundies teaching material does. Admitedly, the book is intended to complement the Tech 1 materials, which I guess go in to more detail of gas planning to build on the Fundies teaching material.
It's always interesting to hear what people for for gas planning.
It's always interesting to hear what people for for gas planning.