Yeah when he isn't set to "walk" he doesn't roll asap, or at all if he's on "stop." So you definitely need to practice on "walk." I'll try to get a video up over the weekend of it, with perhaps a 1/4 speed demo to show exactly when things should happen.
In the meantime, I'll continue to fail on the infinite. XD
edit: OK, I have NO clue what I did, but I just did a lagless cancel of the downward banana throw. Like, it did the starting animation of the throw without throwing it, and since I had hit the c-stick again, instantly started doing another down nana throw. I did it with a low to the ground double jump throw cancel. Don't think it's useful, but it was still crazy lol. Too bad I'm in training mode, I would've saved it. >.<
I'm starting to think the double jump version of the infinite, if possible, is just too plain hard to implement in a match. Half the time I even try it, I footstool Diddy. I'm still gonna work on it, but my hopes are dim. I do think it's possible to turn Diddy around and follow up the normal way, though. I'm gonna sleep now, Sharky out.