Has suprising as it may sound, it is very possible to do 3D with a scale heli.
All depends on the model, offering low wind resistance, being swift and agressive
and of course very well balanced.
U l find that there are models made for that like the Sapphire .90,
The Goblin 700 & believe or not an Augusta A-109 with a strong motor and servos
can do wonders. Maybe not like the Experts would do, but if U like scaled Heli like me
& U like to perform crazy moves.
I was amazed to see what a Simple Art-Tech Falcon 400 with a fuselage could do.