Hi @JazzCat itz good news to hear that you are making ground with a softer reed on the growls, i reckon great to hear you can roll your tounge too.
Maybe you been playing so long it seems alien to roll your tounge with the mouthpiece in, so howz about carrying a mouthpiece around for a while in your pocket and just practicing with it and the tounge rolling at odd moments in the day.
Who are some players that use tounge rolls heaps? L
isten and jam along.
Good luck.
Big toungues are rolling, rollin’, rollin’ on a river …
And here’s a good vid i saw, hey check out especially around 6:00 min
Cheers
https://www.youtube.com/watch?v=874gSc8qaXU