About this 3D model

I couldn't find a holder for the odd SainSmart spools with the ridges in the center of the hole so I made one. The picture shows it installed on the printer with the spool behind it. The Octave adapter and replacement filament feeder may be found here: http://www.octave.com/3D-Printer-STL-Files/CDpath4/p54/Filament-Reel-Spindle-Holders/pages.html