I watched a few "as built" videos C.A. and YouTube channel, im doing simply that. For whatever reason I haven't been able to get the interior auto dimensions tool to become available, its not available in the drop down menu.
I believer you, this is far more troubling than it should be. All of the remodel videos, are along the lines of what im doing, but none show a start to finish, a lot just talk about tooling.
In this photo, I've been able to get a lot of the dimensions accurately. im shy of some needed for a continuous (clock wise) rotation, but will work around that. As you can see, that interior partition wall distance, I need to be 18'2, but any time I try to set it, it selects the entire outer wall, rather than just the inside span that I need. Ill continue to troubleshoot, but again, agree, far more difficult for something so easy.