I am also an instructor and have 2 stock Avistars with LA .40's that do a lot of buddy box duty. But I also have another Avistar that I use both for training and to fly for fun. This one has had dihedral removed, custom made larger rudder, moved cg way aft, and runs with Magnum .46 xls and 11x6 APC. Flew a tank thru it this evening just to wind down after flying my Venus and my Dazzler! I will always keep an Avistar in my hangar.