And Munro admits having Strauss back in the side, after missing last week's clash to get married back in South Africa, is a huge boost in the absence of the injured Chris Fusaro.
Munro told the Scotsman: "It is testament to the strength of squad we have got that we can bring players in. Josh Strauss coming back from getting married is a big one because he is a big ball-carrying forward.
"If you had a real in-form player you would stick with him, but the way we play and the way we train, the competition for places demands that we make these changes. That way we keep everybody on their toes.
"If you play at the top of your game then you will keep your place but there are lots of players knocking at the door all the time and it is good to keep it fresh."
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