Nope, just practice,
I started with sax, started to play the flute, my early experiences were light headedness and almost falling over and going man this is hard, now Im probably a better flute player than I ever was a sax player.
The low end notes will eventually come to you without you even realising it, increased lip and muscle strength from repitition.
The key is persistence.
Sax to flute....low end struggle
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