I think I must have no aura. I struggle with touch screens too. Some are better than others. My Roland E-50 is frustrating, Korg Pa800 is a little better. I'm glad that most of the "real time" controls like variations, fills, OTS selections are physical buttons.

Maybe off-topic, but on my iPhone 7, I would guess that one out of four touches produces an unintended result, or fails to produce the desired result (compared to maybe one in fifteen or twenty with a computer keyboard/mouse, and that due to human error.) I can't believe people put up with that failure rate!! Auto-correct is a mixed blessing. Sometimes it changes things that I typed correctly. Now I use voice-to-text when privacy isn't a concern, but even so the frustration factor is pretty high.

My hands and fingers are average-sized and I don't have any neuro-motor defects that I know of. I just think the iPhone's ergonomics are terrible. And don't even get me started with the ergonomics of the camera controls.

BTW can anyone recommend a good Kirilian photographer? :-D