Second time posting within a few minutes, apologies. Entirely different topic, though!
In Fontlab 6, there is an incredibly useful option to extend a curve in accordance to its current curvature (shift+option and drag node). The same mathematical operation exists in Glyphs as the Open Corner feature, but that is, at least for this case, a tedious workaround.
So, feature request: curve extension, pretty much identically to Fontlab 6. Currently, I need to use Open Corner a gazillion times to extend a curve a little and then delete all the crosspaths. Of course, this can also just be done manually and by eyesight, but hey, this isn’t Illustrator for a reason 