Keep flying your trainer untill you can really fly it. I am talking figure 8 touch and goes in both directions- Landing both upwind and downwind alternating passes. Spot landings, learning to use the rudder, flying in 15-20 mph winds... Get so you can put the plane where you want it 100% of the time and make it really do what you want.
99 percent of flyers move on before they can really fly the airplane They can just get it up and down without breaking it. Dont get bogged down with what you are flying. Chances are you are not flying anywhere near the limits of the airframe you have. I would buy an arf kaos from tower hobbies for a second plane if you have truly mastered flying what you have. Cheap and flies great.
Can you do a rolling circle with your trainer? I bet it will do it. Can you make it do it?