Well, ALL AT-6s, Art Tech or not, are killers. This is a plane that absolutely must be flown by the book, on the numbers. In the real thing you have avionics to give you the info you need to survive. In the model you have your less than stellar Mark 1 eyeballs and experience. You DO know where experience comes from, don't you?
With an AT-6, angle of attack and airspeed are everything. On takeoff, give it a hair, and I mean a fine hair, too much elevator and she snaps into the ground before you can even see it. Landing approach? You guessed it. There are two kinds of AT-6s, those that have been violently snapped into Terra Firma and those that are about to.
If you are a very experienced and extremely disciplined RC flier, you can gentle these things around the sky, carrying excess airspeed and handling like you would a vial of nitroglycerine. You can survive that way. But one day your brain says "I'm not having any fun." It's a WWII wannabe warbird! A trainer! Let's do something cool." And then you exercise the garbage bag.
Here's a great video showing an extremely well-qualified pilot demonstrating the good, bad and ugly of full size AT-6 stall characteristics. Please heed the warnings of death contained herein!
Here's what happened to a commercial pilot who regularly ferried WWII warbirds from show to show when he let his guard down probably for a couple of seconds on a routine flight in front of the beach at Santa Rosa, Florida.
Models have the same anti-social behavior.