Low draw difficulties....

[Where's the Cart Girl?]

So one of the shots I've really been devoting some practice time to has been the low, piercing draw that I see people play. The "stinger" if you will. I'm at the point where I can hit it pretty consistently (60-70% or so) with my 3 and 4 irons (no 2 iron in the bag... yet) and I'm confident to play it on the course when a shot is asking for it. Back in my stance, right foot back a touch, abbreviate the backswing/followthrough, and focus on swinging around my body and snapping the wrists.

But trying this same technique with the 3 wood and driver have been pretty disheartening. I ride a fine line between dead straight and pull-hook, and most swings feel exactly the same to me, so I'm just as surprised as anyone to see where the ball goes. So I tried dancing it around in my stance, abbreviating things more, etc.. but still hit maybe 1/10 at best the way I'm trying to.

Anyone who has this shot in the bag, I'd really like to put it in mine. Is there some flaw in the technique I describe that may be limiting its success to my irons? Given that the 3 wood and driver are longer, more rounded faces, etc.. How do you guys do it? I'm open to suggestions. I feel like what I do to move my irons works conversely with my woods. "Punch" at it to keep it low, it goes up.. abbreviate the swing for simplicity, I lose consistency..

Clue me in guys. Thanks.