Platinum Preppy fine point (0.3mm) for scale.
I found these thread-bound kraft paper covered travelers' notebooks in A6 Size with grid lined pages for a good price that had good reviews with pictures from fountain pen users on Amazon. [$9]
And this 5.3" x 8.26" (not quite A5 size but close enough) hard covered notebook with 120 gsm graph lined paper and few niceties like an attched ribbon bookmark, elastic strap, and elastic pen holder also had good reviews from fountain pen users. [$7]
I figured at those prices, even if they aren't the greatest, they'd be a step up from the thin weight randomly acquired notebooks I've been using. With ballpoint and gel pens, I never really considered the paper quality for my notetaking and journaling.
Side note:
Not sure if I'm going to eyedropper convert the Preppy. I might buy another one or two with a different ink color and then convert a few at the same time.
Impromptu Rorschach test creation!