Welcome cheesegeezer. Happy to hear about your project. There is a danger of information overload on this issue. But the responces i have had so far have been very positive.
I have now booked in provisionally my car for coding and once this is complete i can start working on full install.
I have made a little progress today and have some nice high quality Ply of a 9mm persuasion for starting my boot floor. This is some leftovers from a gymnastics floor we have just fitted in our premisis. This will work very well. My builders will make up a template and cut this to size for me tomorow. What will take me an hour will take them 5 mins.
I will try and photoshop up a photo to show what i am thinking of.
E90 330i SE Auto Graphite Grey Metalic