Finally, it works. I finally managed to get a good design that doesn't rely on the annoying Van Berlo Wheel. I failed so many times, but this design just works. I really like how everything just barely fits, and Arms 8 and 2 are constantly moving out of the way. The best part is in the beginning, when Arms 2 and 3 dodge Arm 8; there is only one save space for both arms, but because of their movement, they both barely avoid a collision. This is also the reason Arm 3 is a piston.

I didn't manage to improve the score, but now it loops by using the first input for the last output. ^^