Mario,
nice relaxing tune!

I jumped into listening and then read your post.
Interesting things, those wind controllers, always wanted to try one out. You made a good use of it!

I would put more reverb on the tenor sax to blend better with mix. Also I would tweak drums to make them fuller and maybe lower the strings just a tiny bit. I am not the authority on mixing, just an opinion smile

Best regards,
Misha.