Starts are still up in the air for three-year-olds Starspangledbanner and Shellscrape in Saturday's Group One William Reid Stakes despite both colts galloping impressively at Moonee Valley on Tuesday.The Leon Corstens stable was very happy with the way Caulfield Guineas winner Starspangledbanner worked as was Rosehill trainer Chris Waller with Shellscrape."He worked really nicely," stable foreman Troy Corstens said of Starspangledbanner and added a decision on a start would be made before accept

Starts are still up in the air for three-year-olds Starspangledbanner and Shellscrape in Saturday's Group One William Reid Stakes despite both colts galloping impressively at Moonee Valley on Tuesday.

The Leon Corstens stable was very happy with the way Caulfield Guineas winner Starspangledbanner worked as was Rosehill trainer Chris Waller with Shellscrape.

"He worked really nicely," stable foreman Troy Corstens said of Starspangledbanner and added a decision on a start would be made before acceptances which close at 9am (AEDT) on Wednesday.

The other option was to wait and run him in the Group One Oakleigh Plate (1100m) at Caulfield on Saturday week.

The handsome son of Choisir went over 800m with Dan Nikolic in the saddle, and was timed to run his last 600m in a tick over 35 seconds.

A Moonee Valley winner on debut as a two-year-old on Cox Plate day in 2008, Starspangledbanner handled the Valley circuit well.

"We thought we'd bring him back and familiarise him with it as he hasn't been back for a little while, but he seemed to get around it quite nicely," Corstens said.

"He's going to need to be at the top of his game to beat Black Caviar so we'll see how he comes through today and we'll make our decision in the morning."

Starspangledbanner was purchased for a reported $10 million by Coolmore Stud the day before he ran fourth to Reid rival Nicconi in the Lightning Stakes (1000m) at Flemington last Saturday week.

Nikolic also rode Shellscrape at the Valley on Tuesday and was impressed with the way the Dane Shadow colt handled the course in his workout with stablemate Dystopia.

"He got around really well and was on his right leg," he said.

Waller said he could be swayed into running Shellscrape in the Reid if it looked like the field was going to be small, otherwise he would wait for the Oakleigh Plate.

Shellscrape ran a solid third when resuming in the Lightning.

The Anthony Cummings-trained Turffontein is a definite starter in the Reid and he worked nicely at the Valley with Mark Zahra aboard covering 600m in 37.5 seconds, the final 400m in 24.5s.

Glen Boss will ride the Group One Rupert Clarke Stakes (1400m) winner on Saturday.

El Segundo was not one of the 14 nominations for the Reid but trainer Colin Little took advantage of being able to gallop the 2007 Cox Plate winner on his favourite surface.

Little has the eight-year-old aimed at a first-up crack at the $1 million Newmarket Hcp (1200m) at Flemington on March 6.

El Segundo sprinted home stylishly, running the last 400m of his workout in 24.5 seconds.