I share you,
Today I bring following 5 pens.
Pilot Custom 845 B / Pilot Blue Black
Montblanc Meisterstück 149 F / Pelikan Blue Black
Visconti Homo Sapiens Bronze Oversize F / Pelikan Blue Black
Visconti Opera Typhoon Blue M / Pilot Blue Black
TWSBI Diamond 580 RB + Pilot #5 14k nib SM / Iroshizuku Yuyake
Favourite one is Opera Tuphoon, even it has stainless steel nib. It’s certainity a very hard pen tip, but it’s a reliable pen that can be handled roughly, with a wide tolerance that allows me to comfotability write.
A nib of TWSBI is interchangeable with Pilot #5 14k nib wich is isntalled with Custom 74 or Heritage 91 without any difficult processing. A feed is remained as original TWSBI, then ink is fed very wet, and the nib is getting more flexibility. I love the taste of this.