[V8.0] One/Two-Up Extruder with lever and adjustable tension (E3D support!)

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IMPORTANT The current version only allows mounting with the lever to the left of the stepper motor and drive gear. If you want to mount it with the lever to the right, either message me for updated files or mirror both main frame pieces along the x or y axis and it will work. Additionally, users have reported that printing this extruder in PLA is not resistant enough at ABS temperatures. Printing the extruder and fan bracket in ABS should provide sufficient resistance for ABS printing. It's highly recommended to print the fan bracket and run the fan at a minimum of 50% at all times, which will extend the life of your extruder. Features: - Secure hot end clamping design - Lightweight and low material usage (less than 30 cm3) - Symmetrical (can be mirrored and mounted the other way) - Lever for easy loading - Filament guides for easy loading - Adjustable tension via screw - Uses stock spring, bearing, stepper/hobbed bolt, and long bolts - Fan bracket - New model with E3D hot end support! Requires: - 2x m3 by 10mm bolts - 2x m3 by 20mm bolts - 1x m3 hex nut - 1x m3 by 45mm bolt (optional, for mounting the stepper) See the extruder on YouTube here! How to put it together: Print one of each piece and two of each desired body. One set is designed for the Anubis hot end, and the others are for E3D hot ends. Regardless, print a total of 2 normal pieces, 2 reverse pieces, and a small slider piece. To assemble: Place the bearing on the peg between the two lever pieces. Use a m3x10mm bolt to connect them. Insert the spring into the cylindrical groove and the hex nut above it. Attach the tension slider piece to the end of the spring closer to the hex nut. Note that the tensioner slider piece can be replaced with an M3x10mm or shorter socket cap bolt. Simply insert the length of the bolt into the spring, and the end of the m3x20mm bolt will press against the head of the smaller bolt in the spring. Next, place the lever arm in the large opening, ensuring the spring fits into the small indent on the lever arm. The bearing should be near the hole in the main frame piece. Insert the hot end into the groove and slide the long screws through. No screw is needed for the top right screw hole (the top one that the lever doesn't go on). Use the wood frame pieces as spacers between the extruder and the stepper. Refer to the picture for more details. Assembly picture courtesy of defendor!