Christopher,
Thank you for the detailed reply.
I have plenty to learn in terms of theory, but I always like your detailed explanations and references. Most of that makes sense to me and I will follow up your lessons.
When I play the tune, I play the sax part in the first section and then improvise after the first chorus and go back to the sax part in the second chorus. I will try your suggestions around the f blues to give me more options in the middle part.
Cheers
Stephen J