Yesterday i met with William again and he gave me a copy of the drawing of the factory. It is on a A1 page and it is much clearer that the pictures I previously posted. We are trying to source a A1 scanner so that it can be digitized. I must also get the grenade and the castings off William so that we can scan them using a 3d scanner. The drawing paints a clear picture of what the factory may have looked like and the layout seems to be realistic.
At the moment, I am doing as much research as possible on the factory and trying to get as much detail as possible before I start modelling. The dimensions of the factory differ slightly from the different sources. Over the next few days, I will also have to decide what I will use for the modelling. At the moment I am thinking of using 3d studio max. I will also have to decide what format I want to use, whether it will be a serious game etc.