Little Waltz on a 1939 Selmer Balanced Action Alto

I’n not much into equipment, but I did have an opportunity to buy this lovely horn recently, I’m still working on my tuning and the ergonomics are a little odd at first. This is such a pretty Ron Carter tune, my Bb pad start sticking a short while in, so apologies for any odd notes. My mouthpiece is an Aizen GR with just a 5 tip opening, a very clean sound.