Sailor Pro Gear vs TWSBI Diamond 580

I have this pen, it’s beautiful but heavy. To me it’s not a first pen, particularly with a stub. It would feel really weird to her if she’s only used ball points, gel or fine liners.

a Diplomat Aero. This one is *hefty*; it was one of my first heavier pens and I love the way it feels in hand.

By no meanings I am an expert, I just want a fine nib fountain pen that I could write in the long run. I used to write with Pilot MR and really enjoyed it for daily writing, but maybe cuz my lack of knowing how to maintain the nib, usually after a year the nib gets stuck and I replace it with a new MR. But I have always wanted a fancier fountain pen for long term. I am not a big fan of this fountain pen size but I guess it is a Japanese thing that they like to make things cute and small

5 ultraflex in TWSBI 580 and it just didn't work - the inkflow wasn't there. Every #6 nib I placed into PenBBS struggled to function (and taking out the feed each time was a literal pain I do not want to repeat again). I bought Lamy nibs by mistake and don't even want to start down the Lamy road, so I'm leaving those untouched. I still love all the pens I have, but for future purchases, I think I'll stick strictly to the pens that take #5 or #6 Jowo nibs without much of a struggle in the feed

I love my PELIKAN but for a fine-point nib it's more towards a strong medium and the ink flows very freely. (BTW I bought the PELIKAN Souveran M1000 green/black with a fine-point nib--had to return it because it laid the ink down very thick and, was again, closer to a medium plus nib.). So

Additionally, the ink capacity on the Kaweco has never been a problem for me, as it always got me through at least a whole day of college notes with the EF nib.