It sounds like it is going to be an interesting read. I look forward your finish product.
I actually have a grid of the entire area that the engineers made. It is very rough, but I was able to create maps from it. I have been able to place every unit in the 3rd C.I.D. from when they entered Germany to VE Day. This all will all be in my forthcoming book, `River Assault: Operation Duck The Attack on Leer 28th April 1945. Sorry for the shameless plug.
If you need to contact the archivist at Leer, let me know and I will make the introductions.