Aaron Bidlake admits he has always been a dreamer and this Saturday he is hoping one dream can turn into reality when his smart three-year-old Tulsa King (NZ) (Staphanos) lines-up in the Gr.1 HKJC World Pool New Zealand Derby (2400m) at Ellerslie. The Hastings horseman has long held aspirations of competing in the $1.25 million Classic, and later this week he will realise that ambition when he treks north with his diminutive gelding, who he bought online for just $1,500. The son of Staphanos, who barely reaches 15 hands, failed…