Update 1/28/16:
Modified base to allow easier access to drive gear set screw from behind the spring.
Addeded CTC version. CTC uses a larger diameter spring so the hole has be enlarged to fit this bigger spring.
Update 7/20/15, the other day I made a video on how to install this.
It is my first youtube video ever so go easy. :-)
https://www.youtube.com/watch?v=BXY1MxEjYt0
I've been working on this one for a while and finally finished a few details and tuning the spring tension. Features of this design are: 1. only 2 pieces to print per side. 2. Uses brass bushing from the original plastic. 3. Fully supports Flex filament like Ninja flex and Fila Flex with no jamming.
I know there have been a couple change in the filament drive gear recently. Let me know if any adjustments need to be made. This version is based off the original straight drive gear. I have seen some newer ones with a rim on both sides and due to the tight fit of the drive gear it might rub. Easy fix, I just don't have any of the other drive gears at the moment to test fit.
Leave a comment on how this works out for you. Thanks.