Overhead Service Spine

Overhead service spine module: 1.2 m long, running 2.2 m above the floor, connecting end to end with dead-flat ends on the module edges. It carries the kit's services knob = dry, wet, gas (default wet), the same dial as the island and wall benches.

风格：low-poly, flat-shaded vertex colors, no textures, single shared material, so any set of these merges to one draw call; shares palette and scale with its kit