Hi everyone. I've had an issue that's been ongoing for ages but I've only gotten around to looking in to it now. I took a video of my extruder extruding 150mm of filament. The gear is turning constantly. You can see from the video that the filament is coming out, and then stops and starts again and stops etc... It isn't smooth. I've noticed this for a very long time but was never sure what caused it. As you can see from the attached image, the resulting strand of filament isn't a uniform diameter. It has bottlenecks and ribs on it. I'm wondering if it could be the hobbled bolt not gripping the filament properly. There's no way to view the bolt as it's pulling in filament so it's hard to tell. I've tried tightening the bolts to the max and also at a variety of different levels. They all result in what you see above.