Modern Premier Fp And Rb Section Switching

[ProfessorB]

Quick question about the modern Parker Premier series.

If I were to take a section (including feed and nib) from a Premier fountain pen and put it on the barrel of a rollerball, would the rollerball cap close?

Asking because I have an extra fountain pen section/feed/nib that writes very nicely, and thinking about buying a rollerball and putting the fountain pen section etc on the rollerball cap and barrrel. Would that work? Is there a less expensive way to turn that Premier nib unit into a working pen?

 

I've done this with Sonnets and it's worked just fine, but I don't have a Premier rollerball anywhere near me to check. Wondering if I'm about to make a $100 mistake by buying the rollerball to use its cap and barrel with a FP section.

Edited July 15, 2018 by ProfessorB

[ProfessorB]

I know that many of you out there have much more experience than me about such matters. So please feel free to tell me if the answer is obvious, or if this is otherwise a stupid question. I live in the sticks, so can't just walk into a pen shop and check whether Parker Premier Fp sections are longer than Rb sections.

 

(I would have assumed that the sections are interchangeable, as they are on my Sonnets, but the only other pen I've tried to switch this way is a MontBlanc 144, and it turns out the Rb section is a bit longer, so the Fp section hits the cap before it is fully closed.)

 

Someone must know. Even if you don't, hazard a guess. Speculation is wholly welcome.

Edited July 15, 2018 by ProfessorB