taking apart these hubs is easy and rewarding. But, if your list of things to do could use a checkmark I recommend flushing your hub with WD-40, letting it dry overnight and adding 10 ml of motor oil. this has fixed every shifting problem I've ever had with a SA hub. All of this hunting for an oil that works as well as motor oil but has a different name is ridiculous. if you want to be fancy use synthetic motor oil. real men don't put sewing machine oil on their bikes.......