I spoke with the curator and showed him two AH films, one of Redbull in a 109 K4 and one of Krupnski in the same bird. The Redbull video was of him beating a Zeke on the deck and immediately a Spit and the Krup video was his YouTube video of "The perfect tail slide".
The curator said, " without a doubt the K4 could have performed those maneuvers in RL. The Germans just never needed to use the plane in that manner." "K4 had more power and was more torque-assisted than any other plane in WWII for its weight....and as long as the pilot could ride the rudder out of the stall, have enough room to pull out of his situation, absolutely."
Thank you and see you tonight.