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DC Gearbox TT Motor to LEGO® compatible Cross Axle : ID 3810 : $3.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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4th Generation Super Motor and Remote Control Upgrade Kit for Lego 42141 Technic McLaren Formula 1 Model, Gifts for Adults, Compatible with Lego 42141(Model not Included)
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