"If we take them lightly by making too many changes we could get a fright.''
Captain Kieran Read said after the six-try victory at AMI Stadium the Crusaders forwards were determined to take the fight to the Bulls, who typically are a pack-oriented team.
To that end they competed extremely well in the lineouts - in order to prevent the Bulls from starting their infamous rolling mauls. Hewett was satisfied with his men's work there, saying they made a mess of a couple of their throws, but stole or disrupted four the Bulls'.
The scrum, with Wyatt Crockett and Owen Franks to the fore, was extremely solid.
"The guys were mentally switched on for the game. They delivered the same intensity that the Bulls showed against the Blues [a win for them at Eden Park].''
After opening away defeats to the Blues and Hurricanes, this performance was of a different class from the Crusaders, who showed plenty of enterprise in their backline to go with their forwards' grunt.
Tom Marshall, a fullback drafted on to one wing in the absence of Guildford, scored an individual try and later received the players' player of the day award.
With Guildford's impending return, it couldn't have come at a better time.
Hewett confirmed Guildford would be in the frame for Saturday night's match against the Kings.
He said Guildford was in excellent fitness but had to learn the Crusaders' set plays.
"It's not going to be an easy coast back in for him which is good because he wants a challenge as well.''