but that's one string, and at most it changes the tension on 4 of the strings, most likely the mains in the center. if you leave it half done with all the mains and none of the crosses, you're askin for it.
i did that with my old Prince Thundercloud, and it was not pretty.
6 point mount too.
The mounting system is there to hold the racquet, prevent it from twisting AND keep the stresses in check and fairly balanced as the racquet is strung. I'd like to see a racquet that was broken while mounted properly in a stringing machine. I've left the mains strung many times without immediately starting on the crosses and have never had a problem... and that's with a 2-point mounting system.