So here is my story of what I did with both my 146 and 149 75th anniversary fountain pens both with rose gold trim and MOP and limited to 1924 pieces. When I first bought them, they arrived with Med nibs and I used them for only short time before I opted for an EF nib size exchange. The service was excellent and both pens arrived back in less than 8 weeks. I started to use both of them and just could not get used to the way the tiny nib end would drag on the writing surface. I was completely bummed because I new at that point that I had made a terrible mistake in sending for an exchange. So I had no choice but to send them back for another fitting of a M nib. Luckily, one of the nibs was ok so they just charged me a small service fee, but the other had been nicked so I had to pay the full fee again for that one.
I am very happy to have them back and now fully understand why most people prefer the med nib as opposed to something narrower. It just writes ever so smoothly on the surface. Lesson learned and pricey one if I may add.
Enjoy the week!!