I've turned a few regular (single barrel) Vertex fountain pens. Some don't care for the cap & finial shape, and sometimes the nib & finial don't stay screwed in tight. I use a dab of LocTite on the finial, the nib you just have to hope for the best. That being said, for the price it's a nice little fountain that writes good and has been a hit with a few coworkers. Simple to turn with just one barrel, the magnetic cap is a nice touch, and the gunmetal looks great imo. I have a gunmetal with Thuya burl that looks very nice, it's my go to at my job. The chrome ones have all been paired with blanks I've cast using different shades of blue as the main color and they too look quite nice although the finish isn't as smooth as the gunmetal, not sure why that is. Also, there's a bead on each end of the barrel, so it's a bit more forgiving of how close you turn it to the bushings. The components have also all pressed together very easily. It's a fast & simple pen to make.