FYI - I opened up the Wall Framing 25 object and did some simple GDL editing to:
1. Add an Offset parameter
2. Edited the 2D script to use this surface_offset parameter (right near the top of the script):
add2 0,-stud_w/2 - surface_offset
3. Edited the 3D script to use this parameter (also near the top of the script):
if ac_refSide then
addy stud_w/2 + surface_offset
else
addy -stud_w/2 - surface_offset
endif
Now the wall framing sits nicely inside the wall cavity at the predefined offset (which should be set to equal the interior drywall thickness).
I found that when following the prompts to "click the side" for where to position the framing, that it worked best when clicking the interior of the building. This allowed the corner options to work properly when using the corner connection with two perpendicular framing pieces.
I did notice that the wall framing code had a small issue with the top and bottom plate for the inside corners, as evidenced in this screenshot - you'll see that the framing for the wall running horizontally ends properly, whereas the wall running up and down (onscreen) has a small offset for the bottom plate (it shows in the top plate as well):
This issue shows up in the original wall framing object; it was not introduced in my code modifications.
I won't be spending any more time on this coding effort myself; I'm sure that @SenecaDesignLLC has done a much more thorough job on reworking this object. However it was interesting to see that such a simple change could actually resolve the main issue - fitting the framing into the wall cavity.
A List in Archicad speak is not an Interactive Schedule.
I use both for a few things occasionally, but mostly just Interactive Schedules.
I know what you mean. "Listing" is a a word in my vocabulary that means the same as Take-offs. I used to do a lot of that with a Digitizer. Don't know if people these days even know what that was. ? 
Still looking?
