Combat models are a different breed of cat
maneuvering is at full power always-unless you are a accomplished "whip power combat pilot"
Years back -I found that my 35 oz profile Nobler could be flown forever -after the engine quit -if a strong steady wind were available to work against.
anyway
the stuff which is popular with many RC guys is the " flail an wail" approach to flying , which started out as the freestyle TOC flopping about cross bred with the lawn dart stuff

The results took flying into a realm of " that's impossible".
As some of the old school boys may have noted, the rules for flight as taught foryears ,are seriously bent.
Too tail heavy?
well on some designs there is no "too tail heavy" rule
a very light model can be flown -under control with the cg at the trailing edge of the wing.
The flightcharacteristics may be horrible but it CAN be done
with a really sharp guy at the sticks -a model can be backed up vertically-for a few lengths-using a reversing pitch prop.
Anyway the 3D "destroy the airframe" approach does include full speed flight with sudden throttle chop and instant 90 degree stop and then hover
Also a fast vertical spin which is cross controlled and just as suddenly braked to a very slow spin
These approaches to entertainment are popular and are part of some new events -indoor electric is one which has some really amazing flyers.
The rules for setting up a nice flying scale model of a Cessna -really don't have much influence on these setups .
Back to my first rule of trimming
If the plane is light enough the cg does not matter
and if it's too heavy it still doesn't matter.