Hi Steve, thanks for digging the tutorial!!

Overcoming those hurdles takes a laser focus and lots and lots of drilling. I suggest isolating the trouble spots (eg. a quick chord change or tricky lick), slowing it down enough that you can correctly play the part, then spend 5-10 minutes playing that part slowly over and over again. The key is the repetition as you are playing it correctly at the slower tempo. Add this drill to your daily practice routine.

With more and more drilling, it becomes burned into your muscle memory with your fingers more limber to be able to play the part easier and easier. Slowly raise the tempo as it feels more and more comfortable to play, but never play too fast that you aren't playing the part cleanly and correctly.

Give yourself the mindset of an athlete training for the olympics. The drilling can become boring, but there's no other more effective way to overcome these barriers.

Make sense? Let me know how it goes!

Mike