The now seven-year-old Winx heads to Saturday's Group Two Apollo Stakes (1400m) at Randwick unbeaten since April 2015 and expected to notch her 30th consecutive win.
"I'm always mindful of her behaviour in the barriers," Bowman said.
"As I've always said, she can be a little fractious. But she has matured with age and she hasn't had any issues with them for a couple of preparations now.
"The beauty of Winx is she's arguably the fastest horse in Australia over the last 600 metres of a race," Waller said.
"That's why she gets herself out of trouble more often than not, and that's why she's so dominant.
"So regardless of pace, where she is, we know that last 600 is sizzling.
"The 1400 I think is her most vulnerable distance," Bowman said.