Valve has released CAD files for the new Steam Controller and its Puck under a Creative Commons license. “The idea is to let enterprising modders create their own Steam Controller add-ons, like skins, charging stands, grip extenders or smartphone mounts,” reports Digital Foundry. From the report: The Valve release includes files for the external shell (“surface topology”) of the Controller and Puck, with a .STP, .STL and engineering diagram of each device, with the latter showing areas that must remain uncovered to let the device maintain its signal strength and otherwise function as designed.