Hi Peter,
I learn new things about Blender nearly everyday. but that was not one of those things.
I know you can do that with the alt key (you can do this with almost all settings that are consistent among the selected objects).
Why did I not do them at the same time? Why knows, probably because I wanted to show how having different values affects the stretching differently. Or it’s just one of those things that I always do a certain way….like jumping to front view to add a single bone armature. There is no reason to do that but I just do haha