A friend of mine gave me this wonderful Parker 75, last month. It served him well for years, but he's never been a fountain pen enthusiast, so he never cleaned it. As I received it I washed it all thoroughly, except for the probably most clogged part: under the nib (pic related) Do you know how can I slide off the nib? It seems impossible. Now onto the main topic of this thread. The pen has always been used with cartridges and, under the stress of pulling them out as they emptied, the mating nipple completely broke. Parker was not able to repair it as that section was not being produced anymore, so that's not an option. I'd really love to bring this beautiful pen back to life, so I thought that I could 3d print a nipple and glue it inside the section. Do you think it would work? Do you have any advice about the material/process I should adopt? Thanks in advance