I love the size and feel of these small marvels. I do like the modern ones (I got mine with a BB nib). That said I like to try out a vintage piston fill as well. Are there any ones in particular that I should have a closer look out for? V16 as I understand it, is from the mid 60´s (higly regarded by some people) and then we have the older ones- the 12´s and 112´s(?). So Kaweco fans, which piston filler should I be looking out for..?