Hi doesn't use a TF320. I believe he uses one of the older Major frames painted to look like the 320.
At Wimbledon his rqts were strung with Red Code in the mains and X1 in the crosses. The tension escapes me, but he wanted it strung with 10% pre-stretch so it was strung on the Sensor we had there.
Head IG Prestige MP; USRSA MRT, Wimbledon stringing team since '04; Babolat stringing team '10-'14. Twitter - @therqtstringer