I´d like to buy the Cult Pens Mini Fountain Pen, and since they use Kaweco (Bock) nibs (AL Sport, Liliput and Dia) I want some advice about them. ¿How the Kaweco F and M nibs are compared to a Lamy Logo F or a Sheaffer Intensity M or a Faber-Castell Basic M nibs? I have a tiny handwriting so I don´t like broad nibs, but I have to take rapid notes so I need a good flow (not an easy task to find the right nib).