Here is my review [plus video] of the Conklin Mark Twain Crescent Filler Fountain Pen with a factory stub nib. I'd love to read feedback on the review. If you own one of these pens, let me know how you like the crescent filler and if you have any insight as to how it wears over time. Any folks out there need to get it serviced? I'm also up for constructive criticism about the review (& video) as well.