Need help splitting circular object

I'm trying to print a COG based on a Gears of War design.  I want to print it larger as a wall decoration but in order to size it for my CR-10 Mini, I need to split it into at least 4 equal pieces.  So far I've found some useful instructions for splitting square or rectangular objects but my attempts to split the circular COG design have been unsuccessful.

Can anyone offer any tips on how to split circular objects?

Thanks in advance!


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