I could not contain my curiosity any longer, and I am currently waiting for a Galaxy Blue Asvine P20 with the 1.1mm stub nib.

I'll report back (here and on paper) once I had a chance to use it!

Edit: that was a super fast delivery (I had not expected it until tomorrow)

Edit2: here are some quick notes that I posted on FPN: https://www.fountainpennetwork.com/forum/topic/379693-some-quick-notes-about-the-asvine-p20-11mm-stub/