I like to 'mind map' but often I find A4 too restrictive.

Therefore I'm looking for recommendations for fountain pen friendly case bound A3 notebooks.

I've found the Moleskine A3 folio and the dotgrid.co A3 book.

The dot grid has been reviewed as fountain pen friendly (I suspect due to heavy paper stock) but is spiral bound.

I can't find fountain pen data for the Moleskine folio - has anyone any experience?

I'd prefer the book to be available in the EU.

Thank you in advance.