David Hayes has labelled Ka Ying Rising’s barrier draw of gate seven “perfect” as the world’s top-rated sprinter attempts to win the AU$20 million (approx. HK$101 million) G1 The Everest (1200m) at Royal Randwick in Sydney, Australia, on Saturday (18 October). In a spectacular drone show on Sydney Harbour, Ka Ying Rising was the first horse to have its barrier revealed, prompting a positive and unequivocal reaction from Hayes, who said jockey Zac Purton will have options from the gate. “Perfect. Anywhere from (barrier) four to eight, I was going…