Just joined today. Here's my background. I was the typical band student, played a little semi professional after graduating, and then joined the Navy and played with the boot camp company band. I put down my horn in '92 and picked it up about a six months ago. It's all coming back slowly. I watch a lot of youtube lesson videos from many legends and take their advice to heart. My range and technique has slowly been coming back. I can play up to the C above the staff now. Here's the problem I've had which so far have not found a solution. While practicing scales and exercises I sometimes hit notes which I call duds. In other words while going through a scale any certain note might come out blank. It could be a G or C in the middle of the staff. Nothing that I can't normally play. Another concern of mine is the F at the top of the staff. For some reason I have a very hard time with this note. It seems I can not consistently hit this note the first time. I thought this would cure itself with time, but as my range has expanded above this note it is a concern. I can play notes below and above without a problem. Anyone have any ideas or suggestions. I started with a Bach 7C mouthpiece and have since settled on a 5B. Changing MP's doesn't seem to help me out with this. I have Bach 7C, 5B, 3C, and a Shilke 18. Any suggestions would be appreciated.