it's enough if you just re-force neck, to make it a bit higher. but usually the lower you go, the better.
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when it comes to your first new submission I pulled a sahee in the "sahepro" replay, here just look at dms/moves.

And hmm dude, your skills are pretty decent nevertheless. I'm watching you :P. I mean, you're original and I like that.

Keep in mind tho that if you're stuck - relax all and set joints anew. You'll see that few forces and relaxed rest can help where stiffness didn't.