i am a stringer with a little experience, but i have not strung any one piece jobs as of yet. i have a young lady wanting a walmart racquet strung. it is a wilson 16X20 hope/breast cancer racquets. i tryed to talk her into just buying a new one, but she insists on re- stringing. i think i understand the pattern well enough to try. i think i need to do the mains and skip the last one and start the crosses and come back to the top with the last main. if this seems correct then my only problem is how much string to use for the first mains [short side?] i am trying to keep some youth involved in tennis and hope i can make this work. thanks in advance for any advice.