I printed your filament guide to prevent the annoying crazy unwinding my filament does when I retract it out of the extruder. I also have the your take on tek's jigsaw replacement installed. I'm extremely happy with how both came out. Thank you so much! I do however notice my filament right at the top of the jigsaw replacement bending(when extruder moves forward) after installing the filament guide. The tension is causing my blue filament to turn to a light blue/white. I haven't noticed any quality change in my prints but I am nervous the filament might snap mid print. Is your's doing the same? I might try changing the orientation of the guide to see if that helps. Let me know if this is normal or if you have any tips.

Thanks again!

will print another one shortly, just thought I would mention it could maybe be stronger but I sort of like the idea of having a filament fuse.

I got one of the wider, smaller diameter reels, and it kept coming off the side.

printed this and haven't had an issue since.

Lawsy rules.

This design is to suit the original filament mounting pipe that comes out the back of the machine at 90 degrees.

So far for me it has allowed me to retain the more compact spool mounting setup but be 100% tangle free.

The key is in the filament 'valve'. It is designed to only allow the filament to pass through easily in one direction. This is a simple part but highly recommended with unassisted printing.

http://www.thingiverse.com/thing:31317

Impressive!

Can you post some photos of feeding from the bottom?

No picture needed, just flip the roll over from the picture in the original post.  Filament comes under the roll instead of over the roll, and lines up better with the hole in the doodle.  I've had no issues so far after printing about 1.3kg of my spool.

From Zimmer62 on this forum. There is also a derivative on Thingiverse that extends out the back further.