That's awesome you cracked this for yourself. In todays world we have the a robust collection of human knowledge literally at our fingertips and 2 day shipping on relatively inexpensive products. Good on you for having the motivation to use it.

This could all be in psychosomatic but I swear that my game improved easily 10X over when I started these three things...

1. Watching this before games. It's eye tracking exercises. For me this first video seems to strengthen something. I dont get as much from the second video.
2. This roller designed for arms and legs which makes the process a lot easier and seemingly more effective than twisting and trying to get the spots with a regular roller.
3. Crease movement drills in slow motion concentrating on proper form. Specifically the box drill and bow tie drill. I do a round on my feet and then a round where I drop and get up with the correct leg at my 45s.

I can't stress enough. For me these three things unlocked something next level (still a low level but next level for me) that was deficient in my game. $15 bucks and a lot of experimenting and talking with people about their experiences.