I’ve done some research about that njMK mystery, capturing it at 60 fps to see if I could get a clue about it :
Spoiler
http://img254.imageshack.us/img254/1493/safejumpnjmktweak.jpg
So, Ryu HP shoryuken having a 3 frames startup, frame 4 is the first active one. As you can see it whiffs while the njMK still hasn’t recovered. In following frames, srk hitbox is in fact diagonal and much thinner, so it’s whif is purely related to range and claw crouching. It’s funny seeing Claw with that punch in front of his head and kinda dodging it as he crouches. In fact he is only hit at frame 8, with the later hitbox of Ryu’s knee.
With EX, Claw seems to be hit at the 5th frame, while he’s recovering. So it’s probable that longer ranged 4 framer reversals would hit him too. I’ll do some testing about it, but I think that while this being an extremely good setup vs shotos, my « old » setups could be better against 4 framers.
Still with this, I wonder if they didn’t tweaked Vega’s njMK hurtbox. But it could be purely a matter of range combined to shoryuken’s hitboxes. To be continued…
EDIT : tests against some of the cast.
[details=Spoiler]Izuna drop, foward dash, neutral jump & late njMK safe-jump :
Ryu : all SRK aside EX whiff or get blocked, EX hits — Super hits and hurts — Both ultras are blocked ! =D
Ken : all SRK whiff or get blocked — Super hits and hurts — Both ultras blocked
Akuma : all SRKs whiff — Super gets stuffed =D — U1 connects, and rapes — U2 whiffs =D
Dan : all SRK whiff aside EX which connects — Super blocked — Both ultras blocked
Seth : all SRK whiff — Super & both ultras blocked
Gouken : adequate parry moves will hit — Tatsus whiff or get stuffed — Super hits — Ultra 1 blocked
Oni : all srk whiff/stuffed/blocked — super stuffed — Both ultras blocked
E. Ryu : all srk blocked — Super stuffed — Both ultras blocked
4 framers :
Guy : EX senpu blocked — U2 whiffs
Yun : all DP’s blocked aside EX which connects (only one 4 framer) — Both ultras blocked
Blanka : EX vert ball blocked - Hori ball stuffed — Electricity whiffs — Both ultras blocked
Zangief : Lariats stuffed — EX SPD ² EX running grab hit — U1 stuffed =D
Guile : all flashkicks hit — Medium super blocked — Ultra 1 blocked
5 framer :
Fei long : all flame kicks whiff — Super & U1 blocked — U2 connects
Slower :
— Sagat : LP DP whiff, others blocked — Super stuffed — Ultras blocked
— Chun-li : EX spinning bird blocked — Super trades — Ultras blocked
[/details]
— Timing is not that easy, but when done correctly it’s much safer than I thought. I think it’s properties against shotos are essentially related to distance, which is huge. It’s so big that even if your opponent sees it coming and tries to wake-up throw you, his throw will whiff, which is extremely good.
— Appears to whiff on crouching vs some characters. Whiffs even more often if the njMK is mistimed (at best, should be done at 2/3 of the fall).
As a conclusion, it’s definitely a worthy setup against shotos. Against the rest of the cast it works OK against most. It’s just less damaging than the cLK/jHK old setup vs 4 framers, but safer against anyone but Guile. I would avoid it against Guile and Zangief. =)