Wattage Gain: In the arch of your foot

Joe Friel has a very interesting bost on his blog about where to mount your cleats. In the photo notice where the SPD cleat is? Right in the middle of the arch. I have some old shoes I am tempted to try this, but I have speed plays so the shoes may get weak with the four holes I need.

Why should you try it? 9% wattage increase in a 300 CP60 (FTP) person is 27 watts that is a big gain in a 40K TT.

-I order a set from Speedplay and will post the photos and review of this product. Total set back is 13mm or roughly 0.5 inches.

I plan on using the Paris Mountain Hill Climb to decide the performance change. I will post the wattage data for everyone. I have to admit I am still not sure. But then again a lot of people though that about wattage and helmets years ago....

Any of you try this?

The shoe maker referenced in the blog has this picture of a women in the position. Doesn't look as freakish as it sounds...