Okay I had an interesting experience this morning.
First of all, the last few sessions I've been focusing mainly on grip because I feel like that is actually a huge issue for me. Second, I played with some friends on Sunday and it went disastrously, feels bad man. Third, I watched this video
this video and
this video over the weekend.
In the first video Feldberg talks about using the middle fingers for power and the index finger as a guide, and in the second video starting around 7:29 the guy talks about grip and curling the fingers in more and placing the thumb a little more over the disc. I thought "Wow this is it, it all makes sense now!" So this morning I go out with my new grip with the fingers curled in more and thumb more over the disc and pressing more firmly with the middle fingers and... got absolutely no where. In fact I mostly ended up griplocking half of my throws and nearly taking out my shoulder.
Nearing the end of my time I was just mad at the world, thinking "F this, F my hands, F stupid disc golf", etc etc. I was just tossing the discs haphazardly back toward my bag so I could pack up and go home. Since I wasn't trying to actually throw them legitimately, my hand was extremely loose. And then when I threw one of the discs, the looseness led to my fingers tightening right at the end of the toss, and the disc actually went pretty far.
Boom, lightbulb moment. I thought back to another part of the second video (4:47) where he talks about a drill that just involves keeping your arm and wrist loose, no disc, and just tossing it in front of you to cause your fingers to snap. With this in mind, I started actually throwing the discs one more time - but this time keeping my hand and wrist as loose as humanly possible while still being able to keep the disc in hand. BOOM. Discs were flying (reasonably) straight and about as far as I've ever thrown them, with almost no effort.
Crazy how these moments come at the strangest points in time.
Unfortunately I really was out of time, but I will definitely be using this to inform my next field session. Now I just have to figure out how to keep that looseness but with a grip just firm enough to stabilize the disc through the full throwing motion.