Rhys, you seem to have fully integrated your vibrato into your playing now - and it's being noticed and enjoyed, judging by the comments. That's a really fast turnaround for something like vibrato. The technique must have been there ready and waiting, just needing the concept formulating and hearing it in your head. Great achievement mate.I bought a slow piano backing track from StandardsTrax.com that I think is aimed at vocalists and the pianist pulls the tempo around a lot. It does have the verse at the start and also a short piano solo in the middle but otherwise it is me on baritone trying to play the melody and keep my place.