Retro 51 Nib Change?

[atc729]

I recently purchased a Retro 51 Tornado fountain pen, in Lincoln of course, and I was wondering if anyone knew if I could change the nib out. I do like the nib it came with, but I was wondering if I could swap it out for a stub nib or something. Does anyone know if this is possible and what size would it be? I was thinking it was a #6, but I'm not sure and don't feel comfortable trying to yank out the nib just yet. Thanks in advance!

[PabloAU]

My Retro 51 Tornado came with a standard Schmidt #6 nib and what appears to be a Jowo #6 feed. I've not tried pulling/swapping mine, but I don't foresee any issues.

 

While the nib itself should present no challenge, the collar appears to be more slender than an Edison/Jowo collar, so I'd be doubtful that you'd be able to swap the nib unit as a whole without some trial and error.