Consider to stick with System 7.1 for the PB 180. I think it feels more snappy and runs very reliable. It is possible to replace several extensions or control panels with more recent versions (if necessary).

P.S.: I remember there was a little piece of software called "Disk Light". It does exactly what the name says, i.e. it visualises the harddisk access with the impression of a flickering LED in a corner of the screen.