Showus Ya Diamonds resumes over the 1200m after previously running up to the 1100m.
The extra 100 metres is not of concern for Lockwood, who has his sights set on grander targets for the filly.
"Her form beforehand constitutes a win and if we can get away with it hopefully she can go on to the Gold Coast Guinuas," he said.
Ric Mcmahon retains the ride on the promising filly after a strong association dating back to Showus Ya Diamonds' maiden win in December.
While all eyes will be on Showus Ya Diamonds come Wednesday, Lockwood already has a strong affinity with the track.
"We actually won a cup out here one day on a horse called Play It Straight," he said.
"It was a great day out and you've always got a bit of history at the track when my get to my age," he laughed.
The stable has been busy preparing multiple runners for the 2018 Queensland Winter Racing Carnival, with Lockwood highlighting a pair on three-year-olds in filly Susurri and gelding Naked.
"Susurri, if she runs well on Saturday, she'll take the next step to the Roses and then the Oaks, but all these steps are dependent on one another and she may not run the 2000 when we get there, so we've just got to take her on trust at the minute." he said.
Consistent galloper Naked resumes in the Gunsynd Classic over the 1630m at Doomben.
"We've got a couple of good ones there, but if they're not up to it we'll put them away till after the carnival and try again," Lockwood said.