Extruder for the 3uP! New!: Added new levers!, Use M3 to attach them. I haven't tried them as I don't use this extruder anymore. Please try them, and tell me if they are good.Pros: -Support E3D V6 Hotend -Support Mk8 Drive Gear -Easy view to the inside. -Side hole for cleaning the Drive Gear. -New position for the lever so you can adjust the E3D Fan at the left side. -Top space for fixing the filament cleaner (http://www.ebay.com/itm/221683995759?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT) Thanks to DDeGonge888 for the original extruder (http://www.thingiverse.com/thing:296670) jaygreco for the Mk8 Model (http://www.thingiverse.com/thing:749998) Joe_Snuffy for viewable/cleanable idea (http://www.thingiverse.com/thing:728158) markqv for lever position (http://www.thingiverse.com/thing:699109) Original Assemble instructions from DDeGonGe888 "To assemble: Place the bearing on the peg inbetween the two lever pieces. Use a m3x10mm bolt to connect the two pieces. Place the spring in the cylindrical groove, and the hex nut in the spot just above it. Put the tension slider piece on the end of the spring on the end closer to the hex nut. NOTE the tensioner slider piece can be replaced with an M3x10mm or shorter socket cap bolt. Just put the length of the bolt into the spring and the end of the M3x20mm bolt will press against the head of the smaller bold that is set in the spring. Now, put the lever arm in the large opening and make sure the spring goes in the small indent of the lever arm. The bearing should be near the hole in the main frame piece. Put the hot end in the groove and then slide the long screws through. You do not need to put a screw through the top right screw hole (the top one that the lever doesnt go on). Use the wood frame pieces as a spacer between the extruder and the stepper. See picture for more details. Assembly picture courtesy of defendor!" http://www.thingiverse.com/thing:296670/#instructions