WHAT’S that old adage? Something like if at first you don’t succeed, then try again. Kerry Parker is indeed a subscriber to never giving up. It took the multiple Group 1 winning Kembla Grange trainer 12 starts to snare a Midway Benchmark 72 Handicap in town with Let’s Go Again – and finally he did so at Royal Randwick yesterday. Ridden by Andrew Adkins, Let’s Go Again ($21) led throughout in the 1200m event restricted to eligible Midway and provincial trainers. The seven-year