As my M1000's nib was with some manufacturing imperfection or defects, I returned it to the retailer for the warranty repair, with the specific request for the replacement of the nib. The repair took more than 3 weeks and what I received was a nib adjustment as the repair. I am very disappointed with this outcome and decided to escalate this again with the retailer and Pelikan itself. If the pen is cheap, then, I will let it go. But, for the price range of the M1000 class fountain pens, I could not accept the repair less than the nib replacement.
The nib failed on the following points.
The slit is not in the middle of the nib. As you can see, the slit was somewhat slanted. Look at the triangle imprint on the nib in the picture. Also, the slit in the tipping material is not in the middle.
The tipping material is attached to the nib in a crooked way.
It is difficult to see in the pix below. But, if you look real hard, you can see, the tipping material is attached in less than the perfect manner.
There is some space between the nib and the feed. I can see the empty space from the breezer hole. The nib should rest on the feed perfectly without space.
I am awaiting the reply from Pelikan. I hope they will do the right thing by replacing this defective nib with the new one. If they don't, this Pelikan will be my last purchase from this brand.