Chipping for O2 will be EXACTLY THE SAME as chipping for SSD using a slot.it chip. IDENTICAL. In fact, the O2 chip looks so similar, you can barely tell the difference without an electronics degree and a side-by-side comparison, if the antenna on the O2 chip goes missing.
Your confusion stems from the talk about running an O2 car on an SSD track in SSD mode. A VERY SMALL bridge rectifier chip is needed if you want to run O2 and SSD cars along side each other in the same race, so that the O2 car can get DC power from the AC that the SSD cars are using. This chip sits conveniently on top of the guide pin with the wires hooked into it rather than into the guide braids. This system should work and fit fine in most cars, even slot.it's own.
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