I find the bottom lip rolling in discussion fascinating since that is how I play. I’ve been trying to correct it for more than 15 years. It creates a lot of compression for me, making it quite easy to squeak higher notes. This makes most exercises here easy to do passively up to about high C and a little beyond, especially articulated. However, anything actually playable past about a high D or E requires too much pressure on the top lip to be useful since no more air can get through.

To combat it, I’m going through the Largo and some later stages, but mostly loud/quiet octaves lip buzzing, mpc buzzing, and playing, focusing on aperture corners as much as possible.

Trying to not roll in the bottom lip seems impossible without completely reforming a new embouchure.