Mizuno MP-32 iron set and TGM theory
 

Bought a set of Mizuno MP-32 iron few weeks ago, just realized that they have the same sweet spot postion throughout the set (3 iron to PW).
Quote: “The key to MP-32 and Cut Muscle design technology, according to Lyons, is the perfect positioning of the weight that is "cut" from the "muscle" area of a traditional muscle-back iron and placed in strategic locations in the lower back and surrounding portions of the club. This movement of mass around the club head, Lyons said, ideally positions the center of gravity and creates a consistent sweet spot location throughout the set.”

Per TGM 6-E-2: “Now, the wide face of the shorter clubs allow the sweet spot to be moved a suitable distance back from the leading edge with the result that centrifugal force squares the clubface earlier in accordance. So, with the ball placed farther back from low point it could poroduce a straightaway flight line for all clubs while having the same release point feel. This led to the assumption that one release feel would use on ball location resulting in a constant struggle for consistency. “

I developed following set up and execution procudures after study TGM: for 5 irons, i place the ball in the middle of the stance; for 6 iron, I place a little back of 5 irons; 4 iron, a little further than 5 irons; etc…
For 7 iron, I set up clubface squarely; for 6 iron, clubface open a little bit; 5 iron more open than 6 iron; 4 iiron more open than 5 iron…
8 irons and under, I use AH only; 3-7 irons, I mainly use HH.
I’m a swinger.

this setup worked pretty well for my old iron set but does not seem to work with this new MP-32. I'm hitting 4 and 5 irons pretty good, but hooks 6 and 7 irons like crazy. Is this because of this sweet spot design of MP32? if it is, how do i compensate for it?

The simple answer for this if you are like 90% of players who "swing" is to put the ball back in the stance. You got the book eh? Reference...7-2 bottom of page.

Hooks And Slices: Effect of Ball Location
 

Just remember everybody, that the 'Ball back to Fade and forward to Hook' applies to True Swingers only. That is, those who allow Centrifugal Force to align both the Clubshaft and the Clubface. With the Ball located back of a given Club's Centrifugal Straightaway Point, the Clubface has not yet had time to close sufficiently to Square the Face at Separation. Hence, the Fade.

Conversely, Manipulated Hands Swingers allow Centrifugal Force to align only the Clubshaft. Clubface alignments are established at Fix with the Left Wrist Flat and the Clubface aligned to the Target Line per 2-J-1. They then return to those alignments at Impact, regardless of the Straightaway Ball Location built into the Club. Under such conditions, the Swinger experiences the same Ball Response as the Hitter, i.e., 'Ball back to Hook and Ball forward to Fade'.

check out the TGM achieves:

post #172 dated 7/01/2004. read it and set incubator on high.

The Swinger's Manipulated Hands
 

"Kee-rect!"

-- Homer Kelley

I love my MP-32s. Mizuno's the you know what when it comes to blades.

thanks for the reply guys.
back to my question.
my understanding of TGM 6-E-2 is:
classic golf club design: shorter club - sweet spot further away from the leading edge - centrifugal force will squares it earlier - ball back further - same release feel;

so for MP32: no matter longer club or shorter club - sweet spot same position - centrifugal force has same effect - ball at same spot - same release feel.

does this mean i have to play the ball at the same spot in order to get the same release feel?