<p>The 4 ring parts need to be glued together. </p><p>New in version 8 (vs. version 5): Now easier to assemble.<br></p><p>Flip the filament spool winding direction and guide the filament around the ring like shown on the photo. </p><p>Note that the filament goes behind the Bowden tube. This stabilizes the ring. Additionally, I made a guide for the ring, which is simply clipped on the feeder. Its purpose is to prevent the ring from slipping off and falling. </p><p>The reasoning behind this "reverse bend" trick is discussed in the Ultimaker forum: <a rel="nofollow" target="_blank" href="http://umforum.ultimaker.com/index.php?/topic/5454-ultimaker2-reduce-filament-friction-in-the-bowden-tube/">http://umforum.ultimaker.com/index.php?/topic/5454-ultimaker2-reduce-filament-friction-in-the-bowden...</a></p>
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