Sorry CliveL, we can.
We may use any point aft of the wing trailing edge and any point forward of the wing leading edge.
I don't think you read the question and my answer:
Question: So we can use any reference point we like right?
Answer: Yes
Pray tell me how that is in any way in conflict with anything you have written about being able to take moments anywhere from in front of the LE to behind the TE
What I wrote is consistent with an earlier post. This time I merely added that in practice aerodynamicists generally use 25% mac as a reference in the wind tunnel and aircraft CG in trim or stability work. Would you disagree with that?
CliveL