EV3D4 bonus model for the 31313 set. Instructions here: https://www.lego.com/cdn/cs/set/assets/blt9d825847cfab5c16/EV3D4.pdf | By Tomafuwi Productions Sdn. Bhd. | Facebook
Lego Mindstorms EV3 31313 - EV3D4 Building Instructions - YouTube
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EV3D4
LEGO® MINDSTORMS® EV3 31313 | MINDSTORMS® | Buy online at the Official LEGO® Shop US
Everything You Need to Know about the LEGO Mindstorms EV3 Programmer App! - YouTube