Force measurement

When printing in multi-color with the Prusa i3 MMU printer, the filament often moves inside the PTFE tubes. I created a Spool buffer (https://www.thingiverse.com/thing:3836504) that saves space on the desktop. In experiments, it is good to know the forces required to move the filament along the entire path.
Measuring force is relatively simple. Use a measuring spoon that contains a digital scale. Just replace the spoon with the extension that you print on the 3D printer. Use a thin string to tr