You are invited to visit my blog, where I write my thoughts about jazz and trombone playing techniques:
Grahame Rhodes Jazz Blog
Performance problems? I can help, and it won't cost you anything.
Trombone players are special people. For the most part we did not choose the instrument but the instrument seems to have chosen us. Compared to other musicians, the trombone community world-wide is very small indeed, I believe therefore we should try to help each other be better players.
I have been a professional performing musician since 1960 and during that time I have come across and solved every playing problem you can imagine. This I did either by trial and error or with the very best teachers in the world [See My Story]. In consequence I can solve your particular problem and hopefully get you more work. And if I can't fix it myself, then I know who to ask.
So contact me. Please be concise and I will give it my best shot.