This is the best D1 refill!...
October 15, 2014
This is the best D1 refill! I had to paint the end with a coat of nail polish to
get it to work in my Yard-O-Led Esprit but, so far, so good. I have since
switched most of my D1 pens (Kaweco AL Sport ballpoint and Lamy Spirit) with
this refill. I haven't had a chance to assess how long it lasts, however.