THis is inspiring to see/hear. I worked on a vibrato on guitar for a few years before it finally clicked for me. My breakthrough on guitar vibrato arrived when I bought my first telecaster. There was something about the weight distribution and the feel of the neck that opened the door for me, and once I found it, I could play vibrato on any guitar. I have zero compass for finding it on violin – yet. I have a lot of other rudimentary skill development ahead of me, but I hope someday to have a breakthrough like you did.