Fury, keep the trainer, if for nothing but a back-up plane for the day you bring the 4* home a mite banged up, and it will happen. Then too, if you take it and the 4* out to the field and have a problem with the 4*, you can always crank up the trainer and have a ball horsing it through some slow speed aerobatics. You'll be surprised what those old "school marms" can do with an experienced hand on the TX (and you should have the experience by now.) Enjoy!