One of my first pens is a Waterman Lauréat, and while I managed not to destroy its nib it did gush ink, so that every time I tried to use it there were big drops of ink in the cap; it was a shame as the nib is quite smooth. After years of trying I finally got a donor pen and after trying all section / feed / nib / converter / cap permutations it's finally working as it should, also thanks to Pilot Iroshizuku Fuyu Gaki; there is some ink on the nib but no more gushing. I always intended to use Vert Empire, Lie de Thé or Mandarin but they didn't like this pen. If someone told me the ink could make this much difference I wouldn't have believed it, but hey, it does, and I like the combination of stodgy pen / wild ink.
Anyone else have a similar situation? We might need a database of pens and inks that get along, although except for Rouge Hematite (a.k.a. SuperGunker, on a Lamy Vista) and Platinum Cool (not very cool, that it starts when it wants, now with Mandarin) my other 19 pens / inks haven't been this troublesome .