Watt shot a 6-under 66 in the third round to tie the Royal Perth course record which was set yesterday by fellow amateur Oliver Goss.
"I played really well on the front nine, I was 5-under through eight and that really set it up," said Watt.
"There is a pretty tough patch through the middle so you just have to get through it and ride it out, I was pretty happy with my round."
"The course record wasn't really on my mind, I was just trying to hit the best shot that I could at the time, do the best with every situation, and it happened to be that I tied the course record."
With a tournament total of 12-under the card Watt leads the Professional field but is just aiming to play his best.
"I am just trying to do the best that I can, you play to put yourself in these positions, I really enjoy the position that I'm in so I'm really looking forward to tomorrow.
"Last week was good preparation, I was in contention and I closed it out with a 6-under as well so I'll be thinking about drawing from that experience," added Watt who won the Keperra Bowl in Brisbane just over a week ago.
Trying to keep his nerves in check Watt looks forward to playing with good friend and fellow amateur Oliver Goss on Sunday.
"I'll take it as it comes, me and Gossy are pretty good friends so it will be enjoyable."
"But it's fair game as soon as you step out on to the first tee and all I have to do is play my game and do the best that I can."
Amateur Oliver Goss built on his course record second round score, with a 4-under 68 to be 10-under par for the tournament.
"I am feeling pretty happy in the end, but I made a lot of mistakes out there, I had a lot of birdies but had a few bogeys out there as well, but 4-under, 10-under total I can't be too angry."
"I am an amateur I have nothing to lose, all I need to do is learn from the experience and go as low as possible."
"I'm a couple behind Brody so hopefully my mate and I can battle it out tomorrow and one of us can take it out."
Tied at 10-under with Goss are leading Professionals Scott Strange and Ashley Hall.
"It was a pretty decent solid round, I actually putted a lot better today, I have been really struggling with my putting for the last couple of months but I felt comfortable over it today which is pleasing," said Hall.
Unfamiliar with his amateur partners he hopes they can handle the pressure of being in contention for a Professional victory.
"I have been Professional for six years now so I don't know many of the amateurs, but I am sure they will be young and confident as we all were," added Hall.
"It's a Professional tournament so I am sure he won't sleep great tonight, if I was in his position I know that I probably wouldn't."
"Hopefully we can get off to a good start and we can all play well, you tend to feed off the guys you play with so I hope for their sake they are not to nervous so we can have a good day."
Further showing the depth of the amateur talent in Australia was Nathan Holman who today also equalled the course record, as did Victorian Professional Peter Wilson. Wilson sits outright third at 9-under the card.
A further shot from Wilson is defending champion Rohan Blizard, amateur and Royal Perth Superintendent Michael Dennis and Victorian Andrew Kelly.
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