I bought some Lamy blue/black cartridges and I have been using them in a Safari & a Nexx.
The issue is that they seem to weep ink where they push-fit onto the 'pip'.
I tried wrapping the cartridge with paper, so there's some kind of a seal around the end of the section.
The paper was impregnated with blue/black ink when I just looked, but there was nothing in the barrel.
I would have tried the cartridges in my Yiren 566 but the damn thing has an EF nib.
The cartridges have the 'LAMY' mark and are in a box with a Lamy name.
Has anyone else had any issue with the fit of the Lamy cartridges? The poor fit made me think they might be counterfeit. I have some Lamy Blue cartridges, but I have only fitted one you my Yiren 566 demonstrator, not to a genuine Lamy pen.
My actual Lamy branded pens are a Safari & a Nexx. The b/b cartridges weeped on both pens.
I quite like the Lamy blue/black ink. I don't know whether it is non-gall or not.