Just for example, my friend spent truck loads of money trying to sort out her horse with all the hardware PP sells, I'm not discounting him at all, just saying she went mental and brought everything. She tried waving a carrot stick, which she then had to use to beat the horse off her, using the special rope halter, going bit less, treeless, bare back, talking nicely, yanking the horses head etc etc, all saying it was NH.
So to help her, we got the horse in a round pen and I sent her out, pressuring her to move by moving myself, free lunge basically, you get the idea. I had rope and a helmet on, just in case she decided to stick her fingers up at me and attack. A few flicks of the rope and generally making misbehaviour uncomfortable for her, keeping her moving, turning, doing what I wanted her to do, she began to listen, lick her chops, head down etc etc.
Just my opinion but NH shouldn't be about using certain people's hardware. It's your connection with you horse and how you can get the best out of your horse without going NATO on its butt lol just my thought though, not saying they are right, only that it's worked for me.
I am her eyes, she is my wings. I am her voice, she is my spirit. I am her human, she is my horse.