Tall Paul,
said "without knowing where the m.a.c. of the wing is to start with, nothing else can be done mathematically."

That was MY point, but no matter. I see you turn words into deeds. Well done.
By the way, my proposed CG range is 2.7" to 2.9" from datum. How does it fly at that?

2.7" cooresponds to 17.5% of the true MAC and aims for a Stability Margin of 15% (NP estimated at 32.5%).
My more rearward point at 2.9" aims for a reduced Stability Margin of 10% MAC. I would start at the front point and hope to move it back a little after flight tests.

If your method works for you, carry on. I'll stick to mine.
Where is that Palos site BTW?
Alasdair