I don't mean to sound harsh...please don't take it that way....but from post 21 I don't think you have mastered the trainer......Now of course I haven't seen you fly.....and I am not taking anything away from your skills........nor Am I saying you aren't ready for a second airplane.....What I am saying is that aircraft is capable of more than you have pushed it to......inverted flight as in the whole pattern.....and perhaps some elevator and rudder to help in a slow roll......with a more aerobatic airplane these manuvers are easier to perform....perhaps that is the only way to learn them...then go back and apply what you learned to the trainer.....
I wonder if we ever truely master an airplane......Good flying to you and good luck