My old transponder was similar to the ones we now have [although i havent paid for mine yet] and that plugged into the battery port on a basic 27mhz receiver. That transponder only had 2 wires from it as i believe the i-laps system has. If this is the case i cant see any reason why it wont work from the battery port thus eliminating the need for a 'y' extension. I think some rtr models will be the only ones that need the 'y' piece and that is only when they have an esc and a steering port. Cheers Andy
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