Anyone else know where to get the "fine" blue and black refills from in the UK? The "medium" ones available from PC World I find really naf to write with - they have too much rolling resistance and no point definition.  They are marked with three circles and two lines. The ones I like best for fast, accurate Livescribing are marked (blue) 020-00072 BLF 09.08 and the black ones are 02-00042 BKF 06.10. I can't seem to find these on Amazon and PC World staff also seemed baffled. Yep, I have resorted to writing only in red as the reds in the PC World sets are "Fine".