After speaking to Logitech customer support today, getting an incident number and a confirmation that this is a known issue with no repairs possible (for the customer) without breaking the warranty, having it replaced was pretty easy. They emailed me the indicent details, this was enough for the online dealer i bought it at to refund my purchase when it's returned. So, ordered a new one directly from Logitech now, says in stock and hopefully will be on my doorstep soon enough.