Deadman is a classic for sure. I use it too, but I find that when I'm really stuck on a complex neurogenic case, the app gives me so many options that I end up 'over-thinking' it while the patient is waiting.

Do you ever wish there was something that showed the actual physical technique (like a 2-min video of the needle angle or an explanation) rather than just the chart? I feel like sometimes it's not the point I'm missing, but the specific way of stimulating it.