Filament spool rest for a Folger RepRap 2020 Prusa i3

A filament spool rest for a Folger Technologies RepRap Prusa i3. This rest is intended to allow the spool to turn more freely than when resting directly on 2020 aluminum extrusion. Not only is the friction between the spool and the support reduced but the spool is also prevented from rubbing against the vertical frame member.