Filament Level Gauge

Wanted a visual gauge I could use to see how much filament I had left on any given spool.

I get all my spools from inkstation.com.au, so if you buy them from there too the gauge should fit no problem. The spools are 1kg and are approximately 196mm in diameter, with the filament going from 13mm to 58mm around the spool as measured from the outside edge towards the centre.

I estimated cylindrical volumes and rounded off the percentages to align with 5mm increment notches — hence the percentage filament remaining values.

No raft/brim or supports if built as seen in the pics. I used a 0.4mm nozzle, and the following:
0.8mm shell
0.8mm top/bottom
220C nozzle temp
70C bed temp
0.2-0.3mm layer height
70mm/s print speed
10% fill density

Given it's a simple design, I imagine you can play around quite a bit with the settings.

I have included two files, the first one is a loose fitting one that can be easily slipped on/off to check; with v2 being a tighter fit that clamps on