I have several bikes with various vintages of Shimano free hubs. Having come from the era of the freewheel cluster, free hubs and cassette are not new, I know, but I have not had the occasion to completely tear one apart. I have cog and lock ring removal tools, but I noticed whild repacking the bearings on a rear Tiagra hub the cup has slots for a tool. I looked on biketoolsetc and found a tool called a "saint" cup remover. Is this the standard tool for taking those cups out and taking the spindle that holds the cassette off? I expect to find some nice little pawls and springs, perhaps some little ball bearings under that spindle. It must get contamination in that thing sometimes. Is it so difficult to service? I always thought taking freewheels apart was a pain, but we did it, and usually put too much and too viscous grease back inside before reassembly. That was the early 70's. Thanks in advance for input on this kind of servicing. I don't want to purchase the wrong tool, or have to buy five tools for every generation of Shimano hub since 2000.