Holy moly. I’ve seen Javier Gonzalez a little on YouTube and his mentor, Bill Bing. He’s an amazing player.
I think there are definitely some similarities between how Javier plays and what Greg prescribes–one setting for the entire range of the instrument. And clearly he’s playing relaxed and with a good sound in all registers.
The leadpipe is bit more taxing on the lips than playing the trumpet normally, but in moderation I’m sure it’s beneficial. Greg has some lessons playing leadpipe as well.
My lips have been a bit off lately. I’ve noticed when that happens that some leadpiple and/or mouthpiece and/or lip bending does them some good.
My $.02 FWIW