Could use advice on altissimo
So, I have finally started getting my altissimo notes to come out, but do have a lot of confusion on two points. Firstly, I am having a lot of trouble playing overtones even when I am reaching the altissimo notes themselves. I see several YouTube videos on mastering overtones in order to hit those notes and even have Sigurd Racsher's book, but I am just not getting my horn to hit those overtones. My confusion is that I still hit the altissimo notes, so my question is do I really need the overtone practice? Trust me, I still practice them, get frustrated and then just play as usual and finger those alt notes.
Second question is I understand the fingerings for altissimo are secondary and the primary goal is the emboucher and voicing, apparently (after watching a lot of YouTube videos on altissimo). Most of those videos say tongue position is the key and lately, I amazingly enough find myself hitting the right intended notes regardless of my fingering, so feel like I am finally doing something right. What I would like clarification on is if I am really hitting those and not fingering them, does it sound like I am on the right track? For example, I wanted to play alt C and ending up fingering alt B, but the C came out, so it was the right note, wrong fingering. Can I hear your feedback on this?