So I need at least part of the dash input while in the closing of 623B huh? Hummm ok then. I'm not used to that lol although i guess it would sort of be like CT 2C 214B (bumper) insta-dash 2A 5B air blah blah.
and for the loop, i'm not saying I got it on first try but after a while i got about 6 reps into it before I whiffed it in the corner, I did it 3 or so different times 2 in match and 1 because i was so confused i had him let me do it to him lol. The entire start of me trying it I kept trying to dash back and forth and I never landed it, so I just did the normal j.4C 7/9 dash j.4c j.D blah blah, but then when I didn't hit anything i noticed he couldn't tech as swiftly as I though so I then had an epiphany and thought just wait. And there we go, I still can't do it comfortably or against the wall because it feels a bit different but hey not as hard as I thought. That being said, I won't be able to try again lol so i'll probably fail at it next time.