They are referencing pulling the actual joint. If you wish to tune using the rolling method (which I do not condone, since better tone comes from having the flute rolled...
The official rules state that the stakes must be fastened securely in the the ground exactly 40 feet apart, leaning 12 degrees towards the opposite stake.
The spacing of the forks won't affect your forklift's load center distance rating; however it will affect the stability of the load being carried on the forks. Set the forks...