Second spool holder for original prusa enclosure

=== Update === 

Uploaded a mirrored version plus spool holder rod for a third spool in the enclosure. Perfect for drying filament while printing other stuff. 

=== Update ===

Second spool holder for original prusa enclosure. 

Ideal for manual 2-Color prints as the original feeder can be quickly accessed in the same way.

Use redundant parts from the enclosure/printer:

• 2x M3x12 screw
• 2x M3n nut
• 2nd spool rod from printer (injection molded part) or print the rod I uploaded