I second Jerry's opinion.

Long time ago, somebody gave me a .40 trainer with a .60 engine, which he claimed was good for 3D.

I ended up crashing the poor thing, which was never a good 3D machine.

Good 3D planes are light and have huge control surfaces and a combination of engine (or electric motor)-propeller able to produce plenty of thrust.

You could spice up the Avistar a little to increase its capabilities as a good flier.

Welcome to RCU!