Dear Geo, most content in your post #8, is in line with my post, so is a good part of your last post. So whats the problem you actually agree in almost everything I write.
"As a consequence, I don't think any extra weight in the right places makes a better board in absolute terms. I think that "right" weight makes a better board, that "right" does not mean necessarily "as low as possible"
This is just what I say. If the actual weight distribution and total weight is the best, so why change it.
If someone wants to buy a lighter carbon board which sails worth than a heavyer iSonic so let them do it.
I have spoken with testriders personally, so I know "560" is spot on.