ORIGINAL: vertical grimmace
I do not like sticks. I think they serve thier purpose, but you are beyond that. I think larger control surfaces will teach you much more and advance your flying. Those little twig surfaces on the stick will be a step back. I was doing rolling circles with my extra. That was a blast. It was very effortless.
My Big Stik sticks have fairly large control surfaces and will perform ANY manouver an Extra or Zlin will, plus some.
Rolling circules, hovers, tail touches, harriers ( upright and inverted ) etc are all a snap. Given the Stiks are much sturdier and have better glides, you worry far less about damage and engine failures.
The Big Stik's actually have control surfaces comparable to or LARGER than the Zlin since they span the full wing.
They also are in the prop airflow, making for better 3D and low speed control.