It seems like the real input for this is F22333333 and it is really a real pain in my finger to pull off on a ps2 controller. How do you guys time this? Is there a timing or is it just a mash fest?
For all of my inputs on the 360 I use the tip of my thumb for 12 and the inside of the thumb joint (the one before the nail, not the one that connects it to your hand proper) for 34. Cuts down on any potential delay when shifting from 1/2 to 3/4, and makes f2233 easy.
edit: quick test in practice and I get 33 input before the second hit on f2(2).