แขนประกอบสมบูรณ์ซ้าย

Assembled exactly as described, so swapping out the old arm took me under a minute with no fiddly alignment issues. The threading is smooth and it locks into place just like the original part did.

It fits my existing system without any loose play and feels solid under tension. Only gripe is the finish isn't perfectly polished where it meets the frame, but functionally it's done the job fine.