Difference in weight from Cura to printed model I've recently switched to PETG , and I'm using Cura as slicer and Ender 3 as printer.
I'm printing a model which Cura declares to be 35 g, but if I weigh the printed model it weighs 23 g.
I'm printing with just 1 line of skirt, so its weight is negligible on total weight.
I've replaced the stock plastic extruder with a double gears metal extruder (3Dman 11 Dual Gear Extruder ).

I've also replaced the stock springs with metals ones.
I'm not having a quality problem, just I want to understand if this difference is caused by a bad configuration that could be improved.
Which are the corrections/checks that I need to do in my setup (both printer and Cura) for fixing this difference?
The density of the filament can be specified in the material model of the filament in Cura (Preferences -&gt; Configure Cura... -&gt; Materials and click on the material/filament you are using to slice your model for PETG), look at the value behind Density, the PETG filament I use is using 1.28 g/cm³ (PETG Economy Black -&gt; Specification &gt;).

This field is user editable, so you can change it to your needs. Cura calculates the weight based on the deposited volume.