Yeah I know all these way to do it. That's why I made this request.
Its just boring to do that for like 30 times or more.
For the watch im doing for example I do a lot of bounding box for typography or just for c-lines.
Because I need to align the middle point of the bounding box, with asymetrical things that has no middle points.

It would be cool to have a check box on the Rect tool, to further tweak the rectangle, without need to disable/enable things
I work very fast with MoI because its awesomly thinked, I can truely, but there's still little details needed to smooth the workflow.
(my other request "line from center point" is another one)

(french for Pilou because my english sucks, en gros j'aimerait bien très rapidement tracer mon rectangle grossièrement et bouger les edges, a partir d'un point nodal au centre de chaque edge, bien sur les autres edges se re-dimensionnerait en temps réel, genre un rectangle en bougeant l'edge du haut les 2 edges de cotés sont modifiés.)