I noticed this the other day (through the last 7 years of my playing, it's never been an issue), and I've been pushed to my limit. My guitarist wanted to end a song with an ascension of an F# harmonic minor. Not an issue, but I realized I couldn't play it nearly as fast as I could when descending through it. Has anybody else noticed this? I realize that, by playing with my fingers, it's logical that this should be the case to some extent (ergonomics + all upstrokes). I'm curious if there's a way to build up the ascending speed as well. I realize playing through my modes ascending at various tempos is going to be a huge part of it, but maybe there's some subtle technique issue I've had for years that I'm just now finding out is a minor hindrance. Any suggestions from you TBers?