I bought a selection of the smaller bottles of Diamine ink, its a great way to see what you like.
http://www.diamineinks.co.uk/listings.aspx?catid=67
midnight blue is still my favourite
also I was trying the yellow tonight, though it doesn't stand out very well on white paper, are there any darker papers it would work better on?
then I made a old style pen with some vintage nibs I have and some Bamboo I cut down when I was in Corsica.
it needs some refinement but fun trying.
I also found some Lamy cartridges that don't fit any of my pens, I was going to offer them for free on here,but after last time, its once bitten twice shy.