The combination of maturity and a step up in distance has brought out the best in Spinnaker and he will take a power of beating in the final leg of Sunday's Triple Trio, which is estimated to top HK$6 million.
Spinnaker was a non-factor in his only run on debut last season over the 1,400 metres, and was again struggling to keep up over that same distance when returning on October 11.
Trainer John Size found the timing right to step him up to 1,800m on November 29 and the four-year-old showed good speed from gate 13 to score a handy Class Four win at 25-1.
He returned 28 days later over 2,000m and again showed terrific gate speed to settle near the leaders and pick up nicely to take control 50m out from Baturo for a short-priced win.
Size had him back to the 1,600m for his Class Three debut 15 days ago and he fought on well for third behind Happy Seven and Ribot Legend.
With Douglas Whyte getting down to the minimum 115 pounds, Spinnaker looks hard to deny from gate two.
Napa II has yet to miss a placing in seven starts, including a third win last time out over the 1,600m, and Olivier Doleuze should give him every chance to see out the 2,000m from gate one.