Please see my updated model @ https://www.printables.com/model/162440-inland-reusable-filament-spool-v2
Created this to minimize filament and shorten print time. Can be used on rack or roller style spool holders. There are 2 versions of the inner part. One version has a location for a label. I typically place the labels on the inside of the spool since I use a roller style spool holder.
The author remixed this model.