The best way to mirror a building or parts of it.

Hi. I have a 2 storey house that contains 2 apartments - one apartment on the left of the house's centerline and one to the right. The apartment to the right is a mirrored copy of the apartment to the left. Now I am designing this house as modules, and I would like to mirror the modules to the left, that I am finished with, in order to check if the mirrored drawaings I am making, are correct. I think there are 2 ways to do it:

1) In D-Cam select the parts that belongs to the module and mirror it. Then in the mirrored module to select the parts that belongs to a wall or ceiling and assign it to the correct wall or ceiling in building Mos. Advantage: This works fine. Disadvantage is if not all wall volumes and in my case especially ceiling areas are made in the mirrored module in advance.

2) To mirror in groundplan. This I have not really tried before, with construction objects. What is the advantages and disadvantages in this method?

So:

Method 2, mirrors all wall volumes, incl. wall design all ceiling areas incl. ceiling design?? But that requires of course that there are no walls and no ceiling areas at the right side of the house. Let's say there are 10 walls at the left side of the house. Is wall 1 then mirrored into a new wall, with number 11 - and the same princip for the other walls and ceilings??

Method 1, here wall volumes and ceiling areas have to be made first, so that it is possible to assign the objects to the correct walls. Otherwise wall 1 will have objects that belongs to both it self and the mirrored copy.

I won't forget method 1, because it works very well and can be convenient in some cases. But I guess in this case method 2, might be better.

I have used method 2 and it worked very well for me. One advantage with this method is also that it is much faster than doing it in D-cam (the operation it self is much faster).

The feature is good, but it is missing some functionality - as to pick single walls and ceiling that you want to mirror, in stead of entire floors.