As other commenters have pointed out, all TWSBI pens come fitted with steel nibs, regardless of price point. So yes, they're pretty uniformly "stiff". If you want a "springier" nib, you could check out fpnibs.com - they sell gold JoWo nibs, custom modified to fit TWSBI pens. I bought a B nib for my Diamond 580, plus a couple of custom ground steel nibs for the Diamond Mini (these latter will also screw in to a Vac Mini). The gold nib is wonderfully juicy and smooth - but cost almost as much as the pen itself!
First post! I have read through the thread, I don't think the answer to my questions is in here but my lack of technical understanding of fountain pens may have meant that i overlooked something!
Anyway I was wondering are all TWSBI nibs equally firm, i.e. does the "F" Eco nib have the same *feel* as the "F" 580 nib etc.
I ask because I have been using a "F" ECO for the last month and have been really impressed, great flow and smooth writing have covered up exactly how stiff the nib actually is. I only realised when I unwittingly picked up my Lamy 2K, now I am just thinking that the ECO is a bit of a "nail" to write with!
I want to fall back in love with the pen, but more so the brand, do the more expensive pens have nicer nibs? What would be a good aftermarket nib that would match the feel of the 2K?
Edited to add: if you are who I think you are (DevonReviewer on YouTube?), I've enjoyed watching some of your videos - though it looks like you've added a few more since I last checked in!
Edited by Jamerelbe, 24 February 2016 - 06:45.