Finally found the source of the rattle in my controller! : r/ValveIndex
Custom Teardown of the Valve Index Controller | TechInsights
UploadVR on Twitter: "Replacement parts for the Valve Index will be officially sold by iFixit, though Valve hasn't yet said exactly which parts will be available. https://t.co/DtvIjXcAY9 https://t.co/Om8XcDkoor" / Twitter