As most of you already know, I scratch build an Avitik DI in 1/48 many years ago, learning a lot along the way.
eg, I super glued the brass parts in stead of soldering..!!
In the larger 1/18th scale, I will be able to fine tune the details ( and more detail), and have more materials to my disposal.
Now, somewhere hidden, deep in some hide out, I do have copies of the Original building drawings, obtained from the Technische Museum in Vienna.
I will be looking for them as we speak..!