Well, this one's an easy one, just a picture and some numberings.
I am actually using more words here than CF, which is the first.
This picture shows how to achieve the incredible length of the longest possible strike, showing which part of your body needs to be moved where.
Letters A to G show where the body was when on guard, the man in the picture and letters H through M show the body parts' advancing forward.
A is the location of the left shoulder on guard.
B is the location of the left knee on guard.
C is where the left foot is planted on guard.
The line D is the space between the feet when on guard, ending in E, which is where your right foot should be.
F shows the line your right leg should make.
G is where you should have your right hand.
Moving to strike:
Right hand moves to H, almost a full arm's length forward.
Right knee moves to I, almost a full length of the pace when on guard.
The space between the legs is increased by a little over than a foot, moving the right foot to K
The left foot turns to give a bit more length, designated as L(*).
The left knee moves to M, about a half-a-pace forward.
(*) You need to look really closely, but there is a letter L on the top of his left foot.