It looks like the Goulets have replacement nibs for Monteverde. I am not sure which pen you have, or which pens they fit. I know in the other thread you said it needed some tuning, what is it doing?
Switch inks, try something different before attempting any fix, however minor. Some pens don't play well with certain inks.
Next, do you have a loupe? If so, inspect the tines closely, just guessing (assuming you've thoroughly washed it with soapy water already) but it could possibly be "baby bottom syndrome." Picture a baby sitting on a surface ... forget that image, just google it, Richard's Pen has a diagram. I see that skipping problem in some newer pens. Awfully hard to diagnose without seeing it, just initially try another brand of ink. Good luck!