Filament spool scale

I got tired of guessing how much filament was remaining on the spool, would I have enough to finish the project? Using an arduino uno r3, and a load cell, I set out to solve my problem. I used the arduino tutorial from random nerd tutorials ( Arduino with Load Cell and HX711 Amplifier (Digital Scale) | Random Nerd Tutorials ) to program the arduino, and modified the large spool holder from ratrig ( Official Modifications - Rat Rig Lab ) I used a breadboard to wire up the arduino, scale, hx711, a