Osmiroid copperplate nibs

I'm searching for nibs and pens I can use for Spencerian and English rounhand. Dip pens can be nice, but aren't very portable. I was thinking of modifying a new affordable pen, but I know too little of nib standards, sizes and compatiblities. I found this add for Osmiroid copperplate nibs, and I guess they only fit some Osmiroid models, and can possibly be modified to go with other brands? Vintage is fun, but can end up involving a lot of fuzz, diy repairs and searching for parts.

On the other hand, I have already ordered a couple of vintage pens and are waiting for them to arrive any day now. They are rather randomly chosen, but have aimed for a bit of flex in the nib. I'm sure I will like them, but I have yet to try if they are up to Spencerian elaborations, the part where you press lightly on the nib for the down stroke.

How do you go about practicing a neat Spencerian script with a fountain pen these days?

Osmiroid italic and copperplate nibs, if bought as a unit (nib, feed, housing), can be fitted to vintage Esterbrook pens (J, SJ, Dollar). That's what I used to do with mine. Only have the italics now, and I really should look for a suitable Estie.

BTW, the copperplate nibs are not, in my opinion, sufficiently flexible for that kind of writing, but are not bad for unornamented Spencerian and similar scripts.

Thanks for the tip. I'm still searching for that fine point flexible nib pen. I found a previous thread on the subject, and I'm still reading up on it :- )

So far I have a couple of copper dip nibs, very fine point with just enough flex for the purpose. They feel different from a fountain pen and are mostly for a set up at home.