Pilot POsting nib. If size is important?

[konrad_white]

Hi, I want buy Pilot PO (posting nib) but I'm not sure that I should take #15 or #10. I know that in FA nib the size is important but in PO nib also? I can't find information about differences between this two sizes in writing and everyday using etc. I'm thinking about PCH912 PO nib but maybe PCH743 will be better...
Thank U for every suggestions.

[dfo]

Nope the size of the PO nib is not important in how it will write. All will write the same: awesomely.

[Zou]

I have both. 912 and 743. I had the 912 a long time before the 743, because a good price was hard to find. A bigger feed is always nicer, but there's no problem with the size ten. Your options are closed if you one day get a 823 and want to put the PO nib on it, for that you have to get their size 15. Sadly I do not know of a non cartridge converter pen for pilot size 10.