David Hayes anointed Ka Ying Rising (NZ) (Shamexpress) as “probably the best horse” he has trained, while Zac Purton described the speedster as a “really special horse” after the four-year-old’s incredible record-breaking win in the HK$13 million Gr.1 Centenary Sprint Cup (1200m) at Sha Tin on Sunday. Clocking 1m 07.20s in a phenomenal display of sustained speed, Ka Ying Rising lowered the track record for the second time this season, eclipsing the 1m 07.43s he posted on 17 November, to secure his 10th win from 12 starts and leaving Hayes…