The models we enjoy ( ENJOY), allow one lots of latitude .
Split rudders for drag (rearward lift?) etc..
My use of corny/misleading (to some apparantly) terms is deliberate.
What fun is it unless you get to think about it a bit?
My original Rules of Aerodynamics are tongue in cheek
Some people see rules as gospel
I don't.
I poke fun at lots of stuff -
I try to not poke fun at things I don't understand -at least basically.
My Rules :
1.If wing loading is too high -the CG does not matter.
meaning -if it has a wing loading too high - don't bother -it is just a crash looking for an opportunity to happen
2. If wing loading is light enough - cg still does not matter .
meaning- you can simply drag it in any direction desired.
Somewhere between these two extremes -your dream model will be found.
What kills me is the full scale stuff which ignore rule number one.---
Don't ask--