On good days and with enough takes, I can do some DBX lines
Edit: here’s the audio
It’s been a long process, over 2 years now, though I’ve made the most progress since quarantine. There’s been many incremental aha moments where I thought something worked (like “oh if I follow this trajectory I imagine in my head I tend to miss less on this string change”), but a lot of these realizations didn’t hold up when revisited, e.g. the next day. So there hasn’t been a single “this is it” moment I can recall.
I’ve been doing the following: variation in what I play (a lot of bluegrass though), hand (micro)adjustments until something feels better, and going for speed after I’ve memorized a passage. If something seemed fast but tense, I took that as a good sign and tried to repeat it but while consciously relaxing the tense muscles.
One thing I haven’t seen discussed as much is playing with limited sound feedback. We all hate sounding bad, and it’s discouraging to sound terribly messy when going for speed. So I’ve been using headphones and playing unplugged while practicing these motions, just so I can hear less. I can still feel if I’m hitting or missing and whether it feels smooth or not, so the rest I hope to clean up with plugged-in playing in the longer term.