Keep your trainer.
I have big gassers and high speed planes and always enjoy going back to my Kadet SR. In fact that is all I flew last night. Nice calm cool evening, sat down on the picnic table and had a relaxing evening taking off and doing touch abd goes all night long. It has ailerons and an old Fox 40 on it.
To change some things on your plane you might want a 46 ball bearing engine so you can learn and do more aerobatics with it. The LA 40 is weak in my opinion, a 46 would bring the plane to life.