"Mick Kent is my boss, but Luke is probably my biggest supporter," Kinninmont said.
"He throws me on everything, and I ride a lot of work for him, so he's almost a second boss and hopefully we can repay the faith."
While yet to ride Lake Vostok in a race, Kinninmont did all the mare's jump-outs leading into her first-up seventh at Flemington on June 20.
"She's going great," Kinninmont said.
"I've had a lot to do with her the whole way through but couldn't ride her first-up as I couldn't ride in town, but she's definitely improved on the first-up run and I think she goes in with a real winning chance.
"I think she's an open class mare, building through the grades, so she's been unlucky not to have won a few more."
Kinninmont will celebrate his birthday on Sunday, and it happens the family will be in Melbourne to help him celebrate.
"Dad is coming over from China, Mum from Perth, brother, cousins, uncles," he said.
"It's my birthday on Sunday and that's why they're all coming over, but the race just so happens to be the day before, so that would be a nice present."