Had a moment like that back when I was a teenager taking violin lessons. One day my teacher was berating me for not having practiced enough (she was right) but

Had a moment like that back when I was a teenager taking violin lessons. One day my teacher was berating me for not having practiced enough (she was right) but I insisted it was because my violin was giving me a hard time. So she challenged me: "use my violin and show me". The thing was beautiful to play, and I managed to play the whole piece in a go. She still knew I hadn't been practicing, but I got a chance to play a great instrument. However, my cheap violin did have a good thing: the bare D string would make its box resonate when tuned correctly. And from there the rest of the instrument could be tuned pretty well. I still have that cheap violin, however I stopped playing a long time ago. I should pick it up again some time.