V8 Supercars teams have had to adjust to a revised schedule this morning, and two of the top contenders took different approaches at the Supercheap Auto Bathurst 1000.
After Chaz Mostert's accident yesterday, qualifying was rescheduled and runs at 12.30pm local time today.
That means teams practiced before knowing their starting position - or whether they must contest the ARMOR ALL Top 10 Shootout - which made some reassess their game plan for this morning.
Prodrive Racing Australia boss Tim Edwards said the team "absolutely" changed its approach to practice this morning.
"Probably the biggest thing it disrupts is your tyre plan because you've strategically planned out when you were going to put greens on," Edwards told v8supercars.com.au.
"As you saw, some people ran greens and some didn't - that'll have a knock-on for how many you've got for qualifying and stuff.
"Unfortunately it's one of those things - you make changes overnight to the car and you want to actually feel whether they're going to be good for qualifying."
Next door at Red Bull Racing Australia, boss Roland Dane said his team elected to stick to its initial plan for this morning and focus on race setup.
"It's just meant there are a few things we did slightly differently," Dane said.
"We decided to stick to our plan where other people ran qually simulations then, which we decided not to.
"All we did is just concentrate on Sunday rather than today.
"So well do qually at 12.30 hopefully and we'll take it as it comes.
"I'm not that fussed, we just stuck to our plan and got a practice this morning."
While Prodrive's Mark Winterbottom finished the session a slim second, Red Bull's cars featured 18th with Jamie Whincup in the car and 20th with Craig Lowndes and Steven Richards both driving during the session.
At the tough Mount Panorama circuit, qualifying up the front is important.
But as Dane put it: "last time I looked there are no points for qualifying".
"Last year we managed to lead on the wrong lap," he said, referring to Whincup's last lap loss to Mostert. Both drivers started at the rear of the grid in 2014.