Spool Holder for P3Steel or Prusa i3 single frame

This is a remix of the [Spool holder for the Prusa i3 aluminium frame](http://www.thingiverse.com/thing:68329) by [iPadNanito](http://www.thingiverse.com/iPadNanito). We made one for our i3 but our new printer is a [P3Steel](http://www.thingiverse.com/thing:157303), which has a steel frame of a different width and thickness. We changed the openSCAD code for the Frame Support to make the frame width and thickness variable so you should be able to use this spool holder design for either printer.