It's not that hard, folks. As shown, jam a small screwdriver in a notch and lever it over. On Sturmeys if you have the hub totally disassembled it's easy to get the lockring back on with a cone wrench placed flat on the lockring and then pushed onto the driver at an angle. For some folks apparently the main function of a special tool is just having another tool. Unless one is in the habit of changing cogs weekly it's hardly worth the bother to buy another tool that one has to store and find each time. Besides, much of the joy of being a mechanic is using the "wrong" tool for the job, or modifying something to do the job!