What works really well on controlline stunter has no bearing on what works well on a RC bird -
(also I have NEVER seen a 5 ft radius turn on a stunter - on a combat maybe )
on good areobatic rc we use the thinnest sections weight and strength will allow
as for the lift curves etc.. phooey
Each case has to be tried on it's own actual in use merits .
Build n fly more - the actual needs will gradually show up.