Congratulations. Superb collection you got there.
For anybody who wants to use fountain pen, I'd recommend getting good quality ink and basic good quality pen. Ink makes a huge difference, and low end pens from popular fountain pen makers offer high value for money.
As my handwriting is shabby, I use fountain pens, however at exams I had to use stick pen(ink based soft tip), thanks to the quality of paper at University. After I started using waterman ink, I write my papers using fountain pen. Good quality ink have good flow, little feathering, beedthrough and showthrough which make them worth it. Heck, you can write on newspaper without bleeding. While waterman and lamy ink can be used for writing exam paper, it's difficult to do the same with Camlin or Parker( Quink) in.