Sling enters the rotary-actuator layer from the precision bearing it already owns, and it climbs the layer inside-out - three products, deepest-first by maturity. My reducer-specific cross-roller and flexible bearings are in production. The harmonic reducer completed second-phase production by period-end. The integrated actuator module - combining reducer, frameless motor, servo driver, encoder, brake - is research-reserve complete but not yet in production.