Ok so I installed gDesklets as I saw some images which indicate it should do what I want.
Installed via Synaptic.
Now am I being stupid (probably) but!
1. I run the gdesklets-shell and it displays a rather lackluster selection of desklets. Fine. I choose the clock one and do File > Run Selected Desklet
2. I download a CPU temp desklet and install, all successful as far as messages go. However does not show up in the config tool!
Must be missing something here??