hello greetings from Finland. I call me mustekyna (fountain pen in finnish!) I have a problem with my Montblanc 144 I bought a Montblanc from Germany (a used one) and noticed that the part in the pen end (marked yellow) has a crack. So I would need this part to be changed. Then my daily friend would be in excellent condition. I asked for a price for this change and it was 200 € and I would need to send my fountain pen to Denmark. My pen is in wonderful condition and wrotes lovely and costed 240 €. Am I able to change the end part? How do you call this part, in picture painted yellow?. Do you think I could find an old spare part, this part, somewhere. best regards mustekyna