"I think backing her up after four days might have been why she didn't go quite as quick on Monday,'' Betts said.
"A month ago my son James Smallwood noticed she was for sale online and after watching a video of Red Medusa finishing third over 595m at Sandown on October 29 he bought her for me.
"I've been training for 20 years and the best greyhound I have had was Tiny Terror, a little 22kg bitch who made the pace to the home turn when second to Tiempo Dinero in the Group 3 Nowra Summer Puppy Classic in 2017.
"People keep asking me if I plan to try Red Medusa over 720m but I'm not sure she will be able to stay that distance.
"It's a big step up from 600m at Dapto so I'm looking at perhaps giving her a 603m race at Gosford, but in the meantime will probably put her in a 520m race at Wentworth Park.
"My first winner at Wenty came in November, 2014, when I won a 520m fifth grade with Messina Special, named in honour of her breeders Wilma and Tony Messina, who have been having success in town recently with Cheeky Cheeky.''
Earlier at the meeting the local training team won over 350m with Dark Fate, notched a quinella when Vigne Unleashed defeated kennelmate Rocky Pepper over the same trip, then won a similar race with It's A Zoo.