Filament Spool - Scales holder

thingiverse

Made to suit the scales pictured- these scales are cheap to buy on e-bay but surprisingly accurate, slip the holder plate onto the scales, place an empty spool of the same brand and size you are using onto the round support bars and zero the scales, Remove and put your spool with leftover filament onto the scales and you will see exactly how many grams of filament are remaining on the spool. Much easier than guessing :)