I've recently re-considered a fitting theory that I abandoned after inquiring about it and was more or less shot down. But I managed to find a guy who not only has looked into the method, but uses it with 100% success (ie no returned sets built to this standard). He says that he can't sell a standard built iron set anymore.
Here's the premise (based largely off the 1irongolf.com theory): You have an ideal athletic position. Think of any athlete standing in a static position, as they anticipate requiring dynamic movement. Volleyball players. Baseball players. Middle linebackers in American Football. They all stand the same was as the ideal golf posture - feet shoulder width apart, weight centered (or slightly forward of center), spine angled forward. We know in the golf swing the ideal spine angle is around 33° (adjust for your plane as necessary).
Now, in a conventional iron set, you get progressively more bent over. Don't believe me? Stand in front of a full length mirror. Hold your longest iron/hybrid. Get a friend (or the mrs) to use a dry erase marker (or a piece of tape, or lipstick, or whatever) to mark the top of your head. Grab your PW. Now where's your head? What? Below that line? That's what I said would happen.
So now, which is it? Is that 4 iron (or 3 or whatever) put you in your most athletic position? Or was it the PW? Or was it some club in between?
I hit some test
clubs, built on this theory. Every one was fantastic. Great trajectory, consistent ball flight, felt the head just fine... needless to say, I'm re-engineering my whole set. Then every club will be a favourite club. (Oddly enough, my 8 iron was already in spec - no wonder I always hit it well).