I'm in a dilemma with my current TWSBI pen. Bottom line: I have a Vac Mini which I enjoy but am wondering if I would appreciate a 580 more.
I love the design of most of TWSBI's pens (Precision notwithstanding...) and I like having a demonstrator with swappable nib units (though I have yet to buy an extra). As for the Vac Mini itself, I do enjoy the novelty of the plunger/vacuum filling system though it's not a selling point to me, and the nib writes very well.
But...my Vac mini has been very "fiddly" which I don't love: the plunger knob keeps coming off when I unscrew it despite my best efforts and help from Philip Wang on how to reattach. I had to order new barrel O-rings because one just fell off, so it doesn't post well at the moment, and it's a PITA to clean. I bought it as a "travel pen" and the one time I flew with it, I had ink leak significantly despite a full fill, ink chamber sealed, and storing it nib-up (thankfully it was in a Ziploc bag). Finally, it's reasonably comfortable to write with posted (I have relatively small hands), I don't find myself reaching for it because of the effort to post/unpost constantly when writing, and the section is a bit narrow.
Do any of you own both a 580 and a Vac Mini? If so let me know if you think I'd enjoy the 580 more over the Vac based on my issues with it -- I've made a decision to self-limit my pen collection so this would be a "swap" -- I'd likely sell or trade the Vac Mini to any interested and buy a 580. I don't like the look of the Vac 700 but am reconsidering it as well.
Edited by AK-47, 26 March 2018 - 16:36.