// mirror.crd — symmetric part using mirror transforms

let arm: Obj = translate(box(4, 0.5, 0.5), 4, 0, 0)
let hub: Obj = cylinder(1.5, 1)
let half: Obj = union(hub, arm)

// Mirror across all three planes
let full: Obj = mirror_z(mirror_y(mirror_x(half)))
cast(full)