Excellent article by Dean Pappas that takes your thru the many steps to correct the quirks of an airplane. He walks us thru setup, flight observation, correction, flight observation, correction and so on - all with the intent of bringing the best out of your plane.
My Avistar (asymetrical wing profile) flew great at all throttle positions with an Evolution .52 NX. My LT-40 with same engine darn near loops at full throttle. The Avistar is not your basic flat bottom trainer. The only flight quirk of the Avistar was that on landing the elevator needed to be "tickled" or quickly but gently fluttered to get it to flare. Too bad it did not survive my poor soldering of the aileron control rod clevis (of course with a student on the buddy box). RIP