Thanks. Mine's a K46 so I'll likely pull it apart again in the Fall if it makes it through the Summer and see what's in there that looks in need of replacement. Good to see someone else has serviced theirs with success.
No help from JD on it as it's labelled as a sealed unit but some light digging shows many people including me can easily do a drain and fill with a better (synthetic) fluid to make it last longer but not much info on actually repairing them.