Hi, I have a King Tempo 600 trumpet that I've been playing for about 6 months. Before that i learnt to play on a pocket trumpet. My problem is that the B note seems really sharp on my King trumpet - I didn't have that problem with my pocket trumpet (which was an unknown Chinese brand).. Also yesterday i went into a music shop and tried another trumpet (a cheap basic one from China) just to compare to mine, and it seems it doesn't have that problem either with the overly sharp B note. Could this mean there is something wrong with the pistons of my trumpet? Or is it normal for the King Tempo to sound like this. I know I have the slide to counteract the sharpness, but i would rather not have to use this if possible!