The Ireland-bred seven-year-old ran second in the 2019 Group 2 EW Barker Trophy and the 2020 Group 3 Fortune Bowl 2020 (both over 1400m) - and also placed on the Polytrack at his Singapore debut back in February 2019 - but there is no doubt in his trainer's mind that 1200m on the turf is his best trip and track.
Unfortunately for connections, these type of races off a rating of 106 are few and far between but Peters is more than happy to wait until the planets align to send the eight-time winner (once in Windsor) out to earn his keep.
"It's never easy with his rating," said Peters on Tuesday.
"He's so consistent. He rarely drops (rating) points and his last win (in the Kranji Stakes A race on May 21) put him up another five points, which means that he has to carry weight against some good horses now.
"And while he has done well over 1400m a couple of years back, I think six furlongs is his best trip at this stage of his career and the turf is definitely his best surface.
"So there are not many options for him. He has to carry the topweight (59.5kgs) on Sunday but we are happy to run him when these races are programmed."
And why not, given his record in Singapore on the turf over 1200m is exceptional.
Seven wins and five placings – including a third to Lim's Lightning at Group 1 level in the 2021 Lion City Cup – from just 15 starts on the trip and track puts him in elite company.
While handicap races are now harder to win, his trainer is confident of a good run.
"We think he can carry the weight in this field," explained Peters.
"(Jockey) Vlad (Duric) will ride him, as a heavyweight jockey will best suit.
"We 'hummed and hawed' about claiming (with an apprentice jockey) but even with a few kilograms off his back, he would carry a lot of dead-weight (lead in the saddle bag), which is not ideal.
"And Vlad is worth a few kilos and knows the horse well, so we are happy with that."
Only King Arthur off a rating of 101 has been handicapped (58kgs) near Grand Koonta . Given that the Donna Logan-trained sprinter finished second in the Lion City Cup on August 14 where Grand Koonta finished fourth on equal weights, he is the danger.
"He's (King Arthur) obviously a top-class horse," said Peters of the I Am Invincible five-year-old.
"He was very progressive this year and has gone through the grades quickly. He ran super to finish second in the Lion City Cup.
"It's not going to be easy to beat him, as we would give him some weight in this race (3.5kgs after apprentice jockey Yusoff Fadzli's 2kgs claim on King Arthur). He's the danger on paper."
Going forward, Grand Koonta will be aimed at the Lion City Cup next year but will continue to do what he does best at every opportunity.
"Of course the conditions (weight-for-age) of the Lion City Cup suits him at his rating level," he said.
"But while he's super competitive and consistent, he's probably a length off the best horses at equal weights.
"Touch wood, he's sound and lightly-raced so as long as he's happy, we will keep him fresh to show his best when his races come around."
After a cracking start to the year, the Peters' stable - that still boasts an impressive winning strike rate of 15.65% (second only to Tim Fitzsimmons on 16.23%) - has not managed a winner since July 17 (Russian Twist), but that was to be expected given the nature of the racing game.
"Of course, things have been a bit slow in the last two months," said Peters.
"We have a small team, so horses do find themselves out of their winning ratings' zone pretty quickly.
"Things even up. We knew after the good start to the year things would slow down but we have four in on Sunday that look to have found themselves back in the right company.
"Circuit Star ($30,000 Class 5 Division 2 race over 1200m) and Healthy Star ($30,000 Class 5 Division 2 race over 1100m) are in the bottom divisions of Class 5, so that should suit them.
"And Endless ($30,000 Class 5 race over 1600m) and Sir Elton ($30,000 Class 5 race over 2000m) are usually competitive in Class 5."
Further afield, Peters is looking forward to the Group 1 Singapore Gold Cup 2000m on November 19 with his improved stayer, Circuit Mission.
"Circuit Mission has a done a great job this year," he said.
"He started the season at the bottom of Class 3 and he placed behind some good horses in Class 1 and Class 2 races recently.
"So while he might be outclassed in the (Group 1) Queen Elizabeth Cup (1800m) at weight-for-age, he will have a good crack at the Gold Cup with a light weight."
The QEII Cup will be ran on October 15.
