I just send a new to FPN pen user some black ink samples and a pilot varsity in black. I told him how to do the refill, and drew this little instruction set. These instructions work great for your Montblanc fineliner (I've done it), or rollerball (done it too). I can't take credit for the bright idea, to quote Microsoft, I "embraced and enhanced" this little time saver. http://sheismylawyer.com/She_Thinks_In_Ink/2014-Inklings/slides/2014-Ink_270b.jpg