Hi, when I practice I usually practice with open horn, but sometimes I cannot do that and I use wee zee for practice. My range on open horn is up to high C although I can hit even high E, but I seldom go there, only when I slur during warm-up. Now my range with wee zee is around E and I can hit G on the staff sometimes, but it sounds very weak, so it is half an octave loss. Is it normal? Or do I have range problems?