HI, I was doing leadpipe blowing practice (when you remove main slide completely and just play with MPC and lead pipe only). It is ment to focus your sound and to improve your blowing. I figured that when I play low -than a lot of air is coming out of the lead pipe (I placed my palm at the end of the pipe to feel the air) but when I go up than the air decrases until almost notihng come s out -there is still sound coming out but very little air. Does this mean that I have serious range issues? Or is it just a normal thing?