This one is for two

Laser Emitter Button Pedestal Button Weighted Cube Weighted Cube Dropper Fizzler Companion Cube Cube Button Goo Angled Panel Glass Panel Laser Catcher Reflector Cube Reflector Cube Dropper Stairs Glass Grating Piston Platform Tractor Beam Light Bridge Laser Field Laser Relay Turret Rail Platform Sphere Button Edgeless Safety Cube Edgeless Safety Cube Dropper Flip Panel Cooperative