So, I've had my Ahab for a good few months, got it all tuned and set up nicely and I've been having fun with it. I hadn't used it for a week or so until today, but it started almost straight away. I thought I'd check out how much ink was left, so I unscrewed the barrel and it took the plunger unit with it! Luckily I had it nib up, so I contained most of the ink. Turns out the threads on the plunger unit are stripped.