Removing cassette lockring

[RecordAceFromNew]

Some have mentioned using a freewheel extractor to remove a cassette lockring. My freewheel shifter doesn't really fit the lockring properly. The keyways on the tool are fractionally too high and fractionally too wide and only go in about a millimetre or so, so I am glad to have the proper tools.

Really? Are you sure it is not the other way round? The splines of the cassette tool should be higher, and often too high for Shimano freewheels. Freewheel tools should fit cassettes.