Flemington trainer Danny O'Brien is hoping Eraset will respond positively to a drop back in distance at Caulfield on Saturday.

O'Brien feels the gelding's last run, when he finished fifth in the Listed Diamond Jubilee Plate on November 6, showed 1800 metres was a stretch too far.

Eraset will drop back to his pet trip of 1600m in Saturday's Hayman Plate, a distance he has won over four times.

The six-year-old was spelled after his last win at Flemington in June but has failed to find his best form in four subsequent runs.

"Eraset is going back to a mile, which he's got terrific form at, after the Melbourne Cup Day run," O'Brien said.

It will be a different story for O'Brien's other runner on Saturday, Keep Cool.

The gelding, who has been racing consistently this campaign without winning, is coming off a last start fourth to Commanding Time over 2040m at Moonee Valley.

He has drawn gate two in the Perri Cutten Plate (2430m) and O'Brien is convinced that he has a competitive runner with the change in trip.

"Keep Cool is stepping up to 2400 and it will be a good race for him," he said.