Thank you for your approval!
A couple of days after posting this I opened GP without my external monitor and realized that choosing the font sizes with much bigger screen propably wasn’t a wise choice, since the widget texts won’t scale nicely to "13 screens with different resolution…
But I learned from experience and tidied up my Jupiter-8 panel on a laptop screen. The end result is slightly more crammed than the elegantly simple Juno, but to my eyes still looks pretty accessible.