Master precision assembly of upgraded suspension arms and steering hubs for your RC car! Learn to install steering hubs with dual bearings (front/rear alignment critical), secure pivot balls with shims, and torque screws in sequence to avoid misalignment. For rear arms, optimize pivot points with dual bearings and dual shims per side for smooth suspension travel. Pro tips: Verify bearing orientation, follow step-by-step shim placement, and ensure rigid yet adjustable linkages. Elevate durability and handling for competitive racing!