Expandable Spool Holder

The Expandable Spool Holder is free standing, holds as many spools as you would like, and holds most spools of different widths and diameters. The holder will fit spool diameters with a minimum of 6.125", with no real maximum. I have used it for the following standard spools: Makerbot RepRap and Printrbot wooden spool. I plan to design other attachements such as: filament guide, feet for flat surfaces, and attachments for hanging the entire assembly. You can quickly adjust the width with a se