It seems my turbo has been playing hungry hippos and has been chewing on something quite hard such that the front of the input impeller had flattened the vanes and bent a couple too. That said whatever it was had been turned into a nice washer so that's good. Add to this it seems to have burst the head gaskets on the rear cylinder just for a laugh...
Having already spent 550 on it I guess I keep spending. Any recommend suppliers of turbos and head gaskets?
Why did I bother, expensive unreliable waste of aluminium.