Attie -- math is fine-- providing one knows what to do with the results .

As an engineer - you must know other engineers who know how to look up and provide any technical answer - But how to apply it?
That is another thing altogether
Look at the earlier posting on this question.
The math is right -
However ---how would you get the controls to work properly , using such tiny servo throws?
I spent years designing pneumatic controls for high speed machinery -also the operator controls and devices which interfaced them - The system "feel" was crucial to an operator using it.
I am sure you see the same thing with the gliders . operator "feel" is 1-2 and 3 in getting the setup right
The math is a small part of it.