Hello Everyone, I bought a used 149 from an online seller in the U.K. last week. The serial number on the warranty card matches the one inscribed on the pen cap. But what I am curious is the nib size. The warranty card says the nib is Fine (F). But many of my friends who are FP fans say, from what it writes, it should be a Medium (M) nib. Could it be possible that an F writes like an M?
Also, I was trying to switch the ink from Diamine Blue Velvet to Diamine Bilberry yesterday. When I attempted to screw the piston to remove blue velvet back into its bottle, some ink came out from the piston side. This is my first piston pen; I suppose that this could be a normal behaviour of the piston. But when I explained the symptom to a friend who has a 146, he recalls similar experience, said there is a slight leak near the piston threads and suggested that I visit a boutique to have it repaired. Is this normal? Should I have it repaired or should I live with it?