"He went well at the workouts last week and with the scratching of the favourite from his race I think he can overcome the 40m even over 2200m.
"It won't be easy and from a back mark like that you can't loop them and attack to win but I think if he is sitting midfield on the outer he has to go close as he will have too much speed for most of them."
Zarias is owned by Butcher's grandmother Colleen so his wins mean even more than usual for Zachary and he looked suited by one of tonight's $20,000 Winter Rewards races, a great initiative from HRNZ that has added some extra spice to the meeting.
"The stakes going to $20,000 helps and gives us a target at this time of the year and being 2700m it tends to mean the better horses come to the fore.
"I think this race is ideal for him. He has been getting beaten by nice intermediate grade horses but comes in well here and should get a nice run through from two on the second line so he will be very hard to beat."
Butcher pilots inexperieneced but clearly talented two-year-old Gandalf in tonight's juvenile race and while he only just justified his hot favouritism in a similar field last start he came from off the speed in a fast 27.3 second last 400m to overpower his rivals.
"It was a really good win and I think he is a good horse," says Butcher.
"There is only so much you can do to win on debut, you aren't going to pace a quarter (400m) in 25 seconds and win by 10 lengths.
"He may have to come from off the speed again but he has a touch of class."
Among Butcher's other drives are Keystone Comet (R1, No.3), who is in good form but is still learning how to race right-handed while Argyle (R6, No.7) has been an massive improver for trainer Green lately but faces some tough opponents from a tricky draw tonight.