Prusa I3 8mm. Frame Top Rear Spool and Filament Holder.

I plan to add two filament drives on the rear as well with the tubing fittings to be added after they come in.
Created with Design Spark Mechanical, a FREE and extremity easy to learn and use CAD http://www.rs-online.com/designspark/electronics/eng/page/mechanical

Have a great day. :-)