I also agree with you. I do have the mini (ef) the 540 (f) and the vac 700 and I love the mini, the others aren'ty favourites the 580 with the 1.5 is dry and hard to start. It's smooth but the ink can't keep up. Shame. Also like you, I don't need a massive ink capacity to my poor Twsbis lie unused. I should contact twsbi about my dry nib though.
Bookmarks