I think im having the same issue as you, im trying to put a bounding box around a door, however i cant seem to get the bounding box to be square to the element.
I know this is old topic but i ran into a similar problem.
I have a Project with Generic Models [GM] representing the position of the Shafts.
I want create Shafts from those GMs, buts some of those shafts are rotated.
Can you explain (or show) how you managed to ‘rotate’ the Bounding Box.
I guess you used the coordinates from the Bounding Box to create the rotated Curves(?).