Is it illegal if I change smart motor cartridge like this? 
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Official Q&A: VRC 2022-2023: Spin Up
Is it illegal if I change smart motor cartridge like this?
Answered by committee
Is it illegal if I change smart motor cartridge like this?
We believe that this question was previously asked and answered in Q&A 1189. Provided all of the parts shown in these images are legal VRC robot components, this is legal.