For anyone interested, it's not a broken woodruff key. That 'bit' is meant to be part of the driveshaft cog. So, it's worn/snapped off. New cog ordered from ebay, and rubber coupler, £15. Sent from my SM-N970F using Tapatalk
I don't actually know! . It's turns freely, so assumed it was OK, but we know what "assume" does. Ive taken everything to bits to give it all a good clean and lick of paint. I should give it a try tomorrow really. Sent from my SM-N970F using Tapatalk