Barron will hope he isn't waiting until race 10, because Thinking Smart could break his heart yet again.
The Mach Three mare has placed nine times from 14 starts without ever breaking through for a maiden win.
That win may come from Mach Denario, who gets his first chance starting from the front for Barron.
The son of Mach Three has drawn four in the junior drivers mobile pace.
"He's got a bit of bottom to him so I'm hoping he'll be up there handy."
Heretic Franco (R7) is in top form, but the two consecutive wins have come in the amateur drivers' grade.
"It's definitely a step up but she [mile] rated 1:58 last start. I'd like to think she would get out and get handy," he said.
From the rest of the team, Barron said Secret's Out (R3) would be relying on gate speed in front of her to be a factor, while Schwartz Denario (R6) had recovered well from a torrid introduction to C1 racing in January.