Filament weight scale for Ender-3

When the filament reel of a 3D printer begins to decrease, it becomes difficult to tell whether the remaining filament in the reel will be sufficient for the next print.
Here is a weight scale that allows you to estimate how much filament remains in the printer roll and helps to predict whether it will be sufficient for the print you are about to undertake.
The particularity of this realization is that it is housed between the support bracket of the filament roll and the 20x20 mm profile at t