Easy align Ender 3 ptfe capture nut

thingiverse

I created this entirely to compensate for my own mechanical ineptitude, so if you're not as clumsy as I am, the original will likely be sufficient, but I decided to share it anyway in case anyone finds it useful. I was struggling to align the plastic washer in OneBadMarine's excellent PTFE fix - no matter what I did, I couldn't get it to hold in place properly without being out of line somehow. So, I figured, make a version that clips onto the tubing and self-aligns as you fit it. Two washers, both of which clip onto the end of the PTFE, keep them in line. If you have a narrow-throated Bowden connector (internal diameter <5.5mm), you'll need one ender_3_capture_nut_flush_top (topmost washer) for the bottom of the tube that goes through the connector and one ender_3_capture_nut for the top of the captured PTFE tube. If you have a wider throat, use two ender_3_capture_nuts. Cut the PTFE as normal, but push the ender_3_capture_nut firmly onto the end of the PTFE before inserting it into the throat. Then, push the feed tube slightly through the Bowden connector and fit the other nut firmly onto the tube end. Push and hold down the collar on the Bowden connector, then push the tube back through the connector until the nut is flat against its base. Finally, screw the Bowden connector into the heatsink, stopping when you start to feel resistance.