Pete Shea's green and golds are one win away from breaking a 17-year drought after emphatically knocking off United in a Premier League Hockey grand-final qualifier.
CYMS haven't tasted top flight success since 2004, but have put together a sensational run in the second half of the season that's earned them a spot in Saturday's decider against Lithgow Panthers.
Wednesday night's 3-2 triumph was yet another upset produced by the youngsters as they shot out of the gates and took a 2-0 lead early.
And while the performance in the second-half wasn't perfect, they did enough in the early going to secure a win.
"This is very exciting," Shea said.
"At the start of the year, this was probably a stretch of the imagination.
"But, as we've come through the middle part of the season, we've started to play better. We've been stringing some really good performances together."
Confidence is a scary thing in sports, and after getting a taste for success, CYMS haven't looked back.
"Winning creates confidence, but these girls know there's still a lot left to do," he said.
"They have confidence but they don't have it without knowing they still have to work hard."
Shea will take the side through a Thursday night training session, making for a jam-packed four days for the ladies.
"For us it's about maintaining that level of enjoyment, passion and enthusiasm," he said.
"We need to take pride in what we do at training and correct the areas we need to correct."
It's all well and good to plan for a fast start against the minor premiers, but Shea wants that brutal burst from Wednesday night to become the standard throughout the whole 60 minutes, something he knows the squad is capable of.
"If we're going to win grand finals, we need to be playing that high level of intensity throughout," he said.
"That's the culture we're trying to build. We looked at the Australian men's side and what they stand for. We might not be at that same level, but there's similar philosophies."
As for CYMS' opponents, Lithgow has been the gold standard for several seasons and Shea doesn't want to play into their hands.
"We need to defend really well and defend as a team," he said.
The mentor has enjoyed a decorated coaching career at an array of different levels, and says winning a competition is something everyone sets out to do.
"That's the ultimate goal," he said.
"We've got an enormous opportunity. This is a great bunch of girls to work with and it would be great if we won it."
CYMS are the only Orange-based side left in the competition, but United must be commended for their campaign as they put together an excellent winter on the field.
Saturday's finale will take place at Lithgow at 3pm.
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