I'm unreasonably obsessed with playability on my G string. It's the most difficult string by far to play high on, and without the entire violin setup perfectly, that difficulty only compounds itself… Total freedom on the lowest string enables total freedom on all strings.
One thing I've become obsessed with is how tilted high quality violinists manage to keep their instruments. It's almost as if they have them turned so they can show you what their fingers are doing. But what it does is allow the player to more easily access the lower strings and not go sky high with the bow arm.
I had abandoned my shoulder rest and committed to a Hollywood-style chin rest. The chin rest was very expensive. After pulling an all-nighter with some serious experimentation, the shoulder rest is back on, and the chin rest has been changed out for my Guarneri. It's really fascinating how probably 98% of quality violinists play on a Guarneri, and I'm starting to see why. There's something about the curve to it that allows a player to comfortably tilt the instrument. A shoulder rest becomes crucial in securing the tilted instrument without clamping at the hand.
I had abandoned the shoulder rest due to difficulty keeping the instrument stable, but interestingly, it's much easier to keep it stable with a shoulder rest when using the Guarneri. It was the other chin rest that caused problems when combined with the shoulder rest.
A couple of things are very clear, though. 1) Watch invariable trends among pros that are well-outside commonly-discussed violin pedagogy. 2) Don't stay in a lower position on any string. Practice the full length of every string to know what your setup is dealing with. 3) Expect to spend lots and lots of 💰 experimenting… I'm sure more changes are still to come, for me…