The odds are shortening about the chances of superstar Buffering making a bid to win all three Group One sprints in Brisbane this winter.

Buffering is favourite for what trainer Rob Heathcote describes as his nemesis race, the Group One BTC Cup (1200m) at Doomben on Saturday as he attempts to add one of the few honours missing from his scrapbook - a hometown win in elite company.

The BTC Cup and Doomben 10,000 have always been inked in as Buffering's winter targets but connections have been less certain about running in the Stradbroke Handicap.

However, Heathcote has confirmed Buffering will tackle all three, provided he comes through the first two races unscathed and is weighted fairly in the Stradbroke.

"The general feeling is that Apache Cat got 60kg in a Stradbroke and he is the mark in recent times," Heathcote said.

"Buffering hasn't the Apache Cat form so the opinion around the ridges is he will get 58.5kg or 59kg.

"Rough Habit and Campaign King hold the metric weight-carrying record at 58.5kg, I can't see how we can get much more than that on a higher minimum scale."

Heathcote isn't joking when he says the BTC Cup has been Buffering's nemesis race.

"In 2011 we ran into a horse called Black Caviar at her best, then in 2012 he got a stone bruise the day before and missed the race before going down by a neck to Sea Siren in the Doomben 10,000.

"Last year we got caught on a bog track in the BTC Cup and ran fourth."

Heathcote said Buffering had done well since his third to Lankan Rupee on a heavy track in the T J Smith Stakes at Randwick on April 12.

Buffering's overall Brisbane record stands at 18 starts for eight wins and six minor placings but in eight Group One starts in Queensland he has recorded three seconds, two third and two fourths.

Heathcote is very keen to win a Group One race with his stable star in Brisbane.

"He has been so honest over a four-year period all around Australia. He has raced the best and he is still going while many have gone," he said.

"I don't think there would be anyone who would begrudge him a Group One win at home."

Heathcote said long-term he would plot a campaign which could take Buffering to Hong Kong in December.