First, thanks a lot for making this suggestion. In my depression I had not even considered doing this. After reading your post I did a little happy dance and charged my pen work area.
I already have an M200 nib unit taken apart. I took the Ibis nib unit apart and compared the 2 nibs. Leghtwise they were so close I was confident that this solution was a winner even though the Ibis nib was just slightly shorter. But, it just barely does not fit. It is not the length, which could be managed, but the radius of curvature of the nib. The feed on the Ibis has a smaller diameter than the feed on the M200, and therefore the of the nib is also smaller to match. What that means is that with the nib secured by the collar, the tip of the nib is forced away from the end of the feed. Also, becuase the nib is just barely shorter than the M200 nib, either the nib is inserted shallowly into the collar which causes it to pinch and raises it off the end of the feed, or the nib is inserted deeply enough to hold it against the feed where the deflection also causes it to rise and there is very little distance between the end of the feed and the tipping. The diameter difference also means that you cannot use the Ibis feed in the M200 collar, even if the much shorter Ibis feed would still work properly. It is close enough that I could force it to work, but I doubt that the performance would be very good.
It was still a great idea and helped me to learn yet another little tidbit of information about Pelikans.
I got a clunker German pen in the mail today that ended up having a 14k nib, is well built and looks to be readily restorable. And therefore no longer a clunker. I also now have a 140 on the way to help ease my pain.
Between the 2 of them, the wait until I find a good place to put this nib will be bearable.
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