Thanks Manny.. one of my teachers(he's a good trumpet player in my opinion) told me to have my upper lip and lower in the "middle" of the mouthpiece, but when i do this i "scrunch" up my lips for it to fit in the mouthpiece.(I'm not born with small lips
) When i have both of my lips in the "middle" my buzzing on the mouthpiece alone is limited. But when my upper lip is a little higher I can buzz on the mouthpiece alone easily. (I shouldn't scrunch up my lips huh?)