I set the dummy to crouching block everything, no switching, then recorded the dummy (standing) holding back for 2s, then stopped the recording. You could record it holding back for as long as you want depending on when you want to push the play button. I was able to practice the combo by hitting play right as I jumped in and it would switch to crouching block while I was doing the j.B and the fuzzy would happen if I timed it right.
It adds an artificial layer of timing in pressing playback, but you can actually practice the combo that way. You don't have to time the dummy perfectly, you have a window the length of the jumping B where it could switch to crouching and you'll still get the fuzzy right.
