Take a gander at this new hobbed bolt that arrived from arcol.hu today. The reddish mark is my own making, a sharpie stripe to show when I've gotten all the way around. Frankly, these pictures are boring in their perfection.
Worth noting is how the blades are bent in one direction, that must be the way they pull the filament. Which means the way I inserted it must be the correct way, since up here is away from the gear wheel. Which matches well with where the filament goes. Excellent! I look forward to a silky-smooth extrusion tomorrow.