Coming to this a bit late, but this may be useful info to others.
I purchased my original D3 about two years ago, Never have had a dry start problem, using Lamy or Noodler's (Polar Blue, Starry Night Blue, Luxury Blue), but did run into recurring problems with the twist mechanism becoming hard to operate, and then desynchronizing of the nib carriage, door and clip retraction. Three times the pen went back to Lamy, and three times it came back with the pen tech's note "Your nib on new pen." On all four pens the rear body had/has the rubber ring.
The pen is my favorite writer, but its problems peeved me. After letting the locked-up #3 sit in the pen caddy for a number of months, I finally sent it off to Lamy for another your-nib-on-new-pen. I also emailed the pen tech for advice on what I might be doing wrong; he advised me that, because of the precision of the mechanism, I should clean it weekly by flushing the nib and soaking the section in water ("it won't harm it"). I had rinsed the sections, finishing with distilled water, to no avail.
When I felt the mechanism catching on #4, I did something that I hadn't thought to do before: Remove the nib, reassemble the section and body, and twist it to the open position so i could peer into the thing and dope out how it worked. The pen's operation depends upon a rotating collar whose gear teeth engage the door and actuate it, and whose profile moves the clip; and upon a carriage sleeve that carries the nib forward and back. I also noticed a distinct spring-green substance in the sleeve teeth, which I suspect is a non-grease lubricating paste.
So, surmising that the pen's problems were due to rotating or sliding parts binding, I poked some lube paste into the collar gears, and used a QTip to lubricate the raceway in which the carriage sleeve travels. And that ended the desynchronization problems. The D3 now opens and closes like butter. With each infrequent rinsing I inspect the pen's moving parts to ensure the lube has stayed put, and isn't contaminated with grit.
The D3 is a great pen, but its mechanism needs some maintenance.