From my experience of using this pen from the last drop, I have an issue with starting the pen with a new cartridge. The ink will not flow after plugging a new/refilled cartridge. I recommend squeezing the cartridge to get some into the feed. Another issue was baby's bottom. I recommend smoothing it out with micromesh and Mylar paper from Goulet. After tuning the nib, it is easily one of my best writers, the best out of my steel nibs.