mecanum wheel postioning

[cad321]

Yesterday while talking with one of my mentors about the use of mecanum wheels on our bot this year, he mentioned concern about whether the wheels must be configured in a square. I told him that I was pretty sure that we could have them in a wide configuration as well (to aid in turning) however I wanted to double check here.

Can I place mecanum wheels like this without doing mass amounts of math and programming to compensate:

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Or Must they be square like this:

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