All kits are incomplete and incompatible, $110 later to actually replace the extruder feeder because kits contain half of one kit and half of another, only contain half of what is needed. For ex: new extruder feeder doesn't work with the existing feeder tube connector, idler, or screws, slight changes in design require buying everything separately, except the separate components don't work together, so the printer is still down. It ends up being cheaper and easier to replace printer with a model form another company than fix a extruder feeder tension arm that broke after just a few prints.