>>> Hi Pilou, normally that is called a "Variable radius fillet", and it should be something that I can add in. The geometry library that I'm using supports it, I just didn't have time to figure out a UI for it for version 1.
>>> I've added this to the wiki wishlist.

Variable radius fillet : I was planning to add this one on the wishlist. You've done it for me, thanks ! ;-))

Also for me :
- Text along a path (along a curve).
- When using the Array > Dir command, an extra option to choose the placement for the last arrayed object, not the offset point as this is currently the case.