Trainer Caspar Fownes will cast a menacing Karma(NZ) (Turn Me Loose) into uncharted territory on Sunday (3 November) when the sizeable chestnut – outclassed on paper but in career-best form – contests the HK$4.2 million G3 Sa Sa Ladies’ Purse Handicap (1800m) at Sha Tin. Tipping the scale with a body weight of around 1,200lb, Karma has won three of his last four races – each over the mile at Sha Tin. The Turn Me Loose gelding goes beyond Class 2 and 1600m for the first time this weekend, doing…