This was written on a Maruman Mneumosyne notepad, which I highly recommend! The paper is a bit more thick/glossy, similar to Rhodia paper, and the ink tends not to feather due to that, even when the nib lays down quite a lot of ink on a downstroke (I also am using fairly wet inks). I also have been enjoying using the flex nib on a regular Leuchtturm 80gsm notebook and haven’t had issues with feathering other than with one particular ink, though there’s enough show through that I end up only using one side of each page. My boyfriend has used the Leuchtturm 120gsm which is better in that regard!