Noble Boy has been the ruling favourite to win the Country Championship final since before the series began but it has taken him until the last moment to get into the field.
“It's heart in mouth stuff and a relief more than anything,” Blowes told Sky Thoroughbred Central.
“All the markets suggested he should win. He was tough to the line and will be spot on for 13 days time.”
Safe Landing's trainer Kurt Goldman said the winner was too good but he hoped the step up to 1400m in the final would suit.
“Sam (Clipperton) had a lot of faith in this horse,” Goldman said.
“He said he wasn't entirely comfortable on the track today so back to a softer track, which we could get at Randwick, and a step up to 1400 metres should suit him. It's an exciting time.”