Eamonn I like the pen love my Slimline biros the thin line is perfect for me at least twenty years ago I bought one or two hundred extra biro refills still using them this was before they put a blob of something over the tip. My daily users get a workout seldom need refilling.
I agree it was about time to have the choice I find some of the thicker points almost run and smudge. What price are these pen kits by the time they end up in your workshop mate. Are there other clips and alternate centre bands these two show separation, neat and different. What colour background did you use I have been going spare with some of my pics this colour and my white balancing is to blame. As a computer mug I do not know how to artificially correct colour casts.
Peter.