I want to add a shadowline skirting to walls, is this possible to do in the walls tool and will it position flush with the gyprock? i also want to add a rondo vertical batten to a solid wall?
Is there a way that i can custom make a wall and save for future use?
Hello @user8 welcome back. I would create it in the Trim>Skirting/Baseboard section inside the wall tool 
and make the thickness 1mm(see instruction below) image ; You can use the material below if you choose.
It will not recess into the wall in the 3D model, yet it is highly unlikely you will zoom in that far, so the key is to make it look as per the specification.
I would add a recipe for the plasterer to set/sand the Shadowline and add 35 to 45% markup, as it is a lot slower and more expensive than a traditional fix-out.
I have built many homes using Shadowline, and you need to ensure you buy jambs that work with 13mm plasterboard/gyprock as the Shadowline protrudes further due to the setting compound thickness at the join. I hope this image helps.
These are the instructions for adding it to the model on a PC; Mac users need to use the Sync 
function to get the material into the wall tool .
