Ah, the GAT must bring sweet music to your ears. I'm happy with my new ET7-S2, but there's always room for improvement.
The ATV-X is more than the power supply. Chris, the engineer, does a number of things within the module itself. Whatever he does is hush-hush, his secret sauce, and I can't blame him. He modifies a specific model (don't remember which), where the overall build is very good and there is room inside for him to do what he needs to add his mods. He is a beta tester for Apple and there are enough changes to the forthcoming one that he will not be able to use the new box. One of the mods is to add an external connection to attach the cable to his power supply. I thought about adding a separate (LPS) power supply, but the power connector does not lend itself to typical connectors for power supplies. FWIW, I tried using a much better power cord with C8 connector on my Nvidia Shield, but it made no difference. Plus, the company says their crappy cord is mated to the Shield, and any other cord may have a detrimental impact