One issue I noticed when following the tutorial is that it's very hard (if not impossible) to select the sketch origin after adding a diameter constraint to a c

One issue I noticed when following the tutorial is that it's very hard (if not impossible) to select the sketch origin after adding a diameter constraint to a circle on said origin; in order to follow the steps wherein I set the origin as the midpoint for a diagonal construction line, I had to delete the diameter constraint first, then add the midpoint constraint, and then re-add the diameter constraint. Besides that nitpick, my first impression is that this is a long-overdue addition to Blender.