I have been a user of VW for over 20 years but always done things in 2D and now I'm in the process of turning into 3D BIM, but still looking to keep my documents looking the same but with some new features.  My questions is about walls.  When I draw walls I show an exterior wall 4" thick (3 1/2" stud and 1/2" plywood).  I also use different colors on wall between the main and upper for design and contrition documents.  With the wall tools that VW provides the overall wall is a lot thicker.  When