frenk wrote:last week I have been professionally fitted and the guy explained me a method to position the cleats.
Stand with bare foots on the ground, draw a little mark in front of your foot, then draw a point near your foot ball on the inside of the foot. Also draw a point near your foot ball on the outside of the foot.
Then move away your foot and draw two parallel lines that go each one through one of the two points. Take a point in the middle of these two lines, this is where your pedal axle should sit.
You can translate this measure to the cleat/shoe with a caliper.
To make sure the cleats are straight, you can just press the inside of your shoe on the ground, then with a "triangle ruler" (how do you say that in english??) check that the cleat is straight. This can also be changed slightly depending on your preference.
(sorry that's probably my worst ever computer drawing...)
I've been told the same thing since my frst bike , back in the mid-80's, and have always put my cleats this way...
.....Don't know if it's the most efficient way though...