I thought you might like to know that, until recently, I was teaching sports coaching at Loughborough University and used Stack Wedge as an example in seminars to demonstrate the principles of skill acquisition to students — i.e., challenge point theory, feedback process, variable/random practice, and even representativeness/contextual interference with the pressure shots. It's clearly something that has been evidence-informed — and it has massively improved my game, for sure (2862 lifetime shots and counting now!).