Let's Build - Lego Technic Twin-Rotor Helicopter Set #42020

3,547 views · Published 26 September 2015 · 20:15 · Indexed 25 September 2026

Channel: The Hidden Brick · 2015 · Howto & Style

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See the unboxing and build of the Lego Technic Twin-Rotor Helicopter Set #42020

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