Hello Rainer, I have a custom parameter in all of my instances: scale to upm - 2000. I have figured out that this value doubles the size of the thinnest and the heaviest instance. This is how the black font looks like after export (way too large):
And here is the bold font (just right):
I’m pretty sure that Glyphs had a different behaviour before one of the latest updates. I use version 2.5.1 (1140). Is there a way to download an obsolete version in order to export the files properly?