This is absolutely right.but the document is for 5.1
One more important thing to note.
make sure you have ap4511 version greater than 5.2 to use it as a controller.
there are also slight changes in version 5.4
The actual steps will be a bit different for the 4511, but the idea is the same. One difference is that the 4511 does not support an internal RADIUS server so the part on RADIUS Group policies and user pools is not applicable and has to be done in an external server.