No real trick. As soon as you press B start doing 623, then D when you've finished the motion. No delay needed.
If you're super new to the game you might just want to practice the 623 motion until you've got it down pat, as if you're too slow inputting it it won't register the Inferno Divider at all, in combo or not.
Nah, the ID works just fine (altough I really struggled with it when I first tried to do it)
Oh god I can see the *lick *lick being abused, mostly by me
gonna lick you bitches up.