IT’S been a good week for Kembla Grange trainers Kerry Parker and Ross McConville. Both had success at their home track meeting yesterday in between victories at Moruya today and Canterbury last Wednesday. Multiple Group 1 winner Parker produced Rhythm Of The Rein, who made a very promising debut at Kembla Grange yesterday. Ridden by Jean Van Overmeire, the Cosmic Force three-year-old started a well supported $2.30 favorite in the Midway Maiden Plate (1000m), and was too good