Having read all the previous posts, I'm stepping back from mine.
Right of ownership trumps all other considerations. And the experience of writing with such a rare nib is one that's enjoyed by few these days.
I'm a "medium" nib fan myself, and chose to write with the first 6668 nib I acquired. It turned out to be a great experience, as that point writes and flows like a sweet dream; so who am I to advise another to do something different?
You can always clean it up afterwards, and it'll still be a rare nib, eh?
Or accept Gweimer1's offer, and have the best of both worlds.
PS. BTW, nice catch at a good price, sez me.
You got the box?