Hi, has anyone tried different nibs on the Ohto Tasche pens? I figure the Rook is the same pen basically. I have somewhat succesfully used a Kaweco sport nib in it, but it was too wet, and the Tasche nib didn't fit the Kaweco pen at all, so I guess the compatibility is not quite perfect with the Tasche feed. Someone suggested the TWSBI mini nib, and a couple of others I have not been able to locate so far. (I posted a somewhat similar topic elsewhere, but it didn't get much traction, so I figure maybe I posted it in the wrong forum, trying a different angle as well).