Caulfield Guineas prospect Prince Harada went back to school on Tuesday to fine-tune his barrier manners before a return to racing at Caulfield.

Trainer Tony Vasil said he didn't make the trek to Sandown in order to give the son of Haradasun a serious hit-out.

"The main purpose here was to give him some experience in popping out the gates," Vasil said.

Vasil said the Prince Harada began safely in his Ballarat win but the unbeaten three-year-old had to overcome a slow getaway in his Moonee Valley triumph on June 3.

On Saturday, Prince Harada faces his biggest test so far in the $150,000 McNeil Stakes over 1200 metres when he comes up against undefeated Blue Diamond winner Miracles of Life as well as an impressive trio of Peter Moody horses - Kiss Of Life, Thermal Current and Il Cavallo.

With Stephen Arnold on board in the trial, Vasil said Prince Harada erased any doubts that his barrier problems would be an ongoing issue.

"We didn't come here to be winning half-mile trials," Vasil said.

"We're trying to win a Caulfield Guineas and trying to create the horse to be a miler, and hopefully further."

Vasil said Prince Harada was probably at his most vulnerable over 1200 metres, especially up against the calibre of horses he will face on Saturday.

He said Miracles of Life was likely to race more forward than Prince Harada and he wouldn't be too upset if he ran second to the Adelaide filly.

"Our goal is the Caulfield Guineas and it's not as if we'll be going for the razor blades if we don't win on Saturday," Vasil said.

Prince Harada is equal favourite at $6 for the Guineas with boom New Zealand colt Cauthen.

Second Guineas favourite, the David Hayes Fast 'N' Rocking, is also lining up in the McNeil.