3mm to 1.75mm filament converter

I love my new extruder on my SteelBug (https://solar1.net/drupal/Steel_Bug). But I have dozens of 3mm filament in various colors. This machine was built to convert (re-extrude) my 3mm fil to a 1.75mm fil.

The bottom spool in this picture is an existing roll and was just placed there for demo purposes.