So far, I'm pleased and impressed with the idea of the Construction Items (the three points circle is beautiful), but if I may ask for two thing, it'd be:
Ability to rescale Construction Items. If I change the Document size, it'd be great to rescale the Construction Items as well.
Ability to resize Construction Circles individually. Because maybe I didn't create it the right way or I want to adjust it.
Also, I know you can delete Construction Items, but so far I wasn't able to do so. The status bar says Click + RightMouse to delete point, and I suppose that means clicking with both buttons of the mouse at the same time...