Visconti recently changed its small-size steel nibs, did you notice?
All the Rembrandt and Van Gogh fountain pens they're selling, since the beginning of 2018, are equipped with the new model of steel nib. It's quite ugly to see, but it seems very smooth and pleasant to use.
The bad news is that these new nibs are no longer compatible with the grips of the previous model. Not the whole nib group, nor the metal sheet only: they have different sizes, therefore also the slot in the grip changed.
It's a pity, because the full compatibility and the interchange possibility of nibs, even among different pens, was a wonderful feature of Visconti, in my opinion.
You could unscrew a calligraphic EF steel nib from a Giardino dell'Eden and screw it in a Homo Sapiens Medium, for example; even if this one mounts a small palladium nib with a different look. And vice-versa, because they were compatible.
Moreover, also the tip classification changed.
The F, M, B mark is missing, there is a different unit of measurement, now.
I explained all this in my blog: http://blog.giardino...ith-older-ones/