I've just built a mini-tower for some of my old RPi-3s and 2s and thought I would try out SVG to overlay some LEDs (as circles) on top of a photo to show LED status, and some text to indicate the CPU temperature and IP address.
A word of warning... Bart/Steve's SVG node is highly ADDICTIVE and so much fun.
I've just discovered the 'Event' facility. As a test I've arranged it so if you click an LED it takes you to a tab (via the ui-control) that will (eventually) give detailed status information about a specific RPi. On that page is a button that navigates you back to the Monitor page. It was ever-so-easy to implement and it works like a dream.
I can see people creating quite complex navigation paths with this !!!
Shame is I'm off out today, so can't "play" until this evening (hiss, boo).
I promise to write a tutorial guide and post it here, so watch this space.
An animated view of my initial test-layout to prove if the concept would work.