As Michel said, all the information on C-Dimension is available online and in Ralph’s books. C-Dimension is the horizontal cg location from the hosel centerline out to where the cg is located. Generally, shorter C-dim’s result in less playable, or less forgiving club heads. Longer C-dim’s produce more stable and more forgiving club heads. One of our design goals is to design irons that have a high playability for any given design category. Currently, all of our iron designs are either Super Game or Ultra Game improvement models, meaning they are above the 701 point mark (Super Game Improvement) in the MPF equation that Ralph developed, or the 851 mark (Ultra Game Improvement). We have done designs in the past with a shorter c-dimension in 551 + category that is Game Improvement. As Michael mentioned, we currently have two forged cavity blades and our MMB – 17 pure blade that fall into the Super Game Improvement category. We can create these by not being bound to the conventional idea that a blade has to be short with a long hosel and and a narrow sole. That just doesn’t make sense for anyone anymore and really never did. Ralph’s goal with the MPF was to give golfers a way to compare the wide variety of iron designs that exist in the only way that really matters, how they perform based on their mass and dimensional characteristics. You can view all the irons in our database online by manufacturer. As for reasons why we design the way we do, why wouldn’t we? Knowing what we collectively know now as an industry and as designers, why anyone would design iron heads with cg locations not in the best place for stability and performance is beyond me. Read Ralph’s information on the subject and visit the MPF iron list on our sight. Should be helpful.