A while back I posted my scalable flying robot frame, it was pointed out it had one small problem, well now it's fixed with circuits. Should be very useful and simplify Yellow
Factorio Prints: Bot-Boost Bootstrap 0.18+
ロボットフレームアッセンブラー - Factorio Blueprint Showcase
Factorio Prints: Compact Early Game Robot Production "Roboprodo v1.6"