Just a word of caution: powering the OI through the competition port will void the warranty. Pretty much all of the equipment that people have right now is probably out of warranty anyway, but it doesn't hurt to mention it in case someone decides to try this in January with their brand-new OI.
Check the schematic at:
http://www.ifirobotics.com/docs/comp...guide-reva.pdf
Note the text in bold caps (emphasis mine):
Quote:
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CONNECTIONS TO ANY OTHER PINS CAN DAMAGE THE OI AND WILL VOID ANY WARRANTY
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