Waterloo Project: Making the terrain for the whole battlefield

I've had a number of folks respond favourably to my offer to give an idea of how I made the terrain that I showed you in my previous post waterloo-project-our-1:100-refight so here goes. You might like to refer back to that post for the map but the design was based on the simple contours in the centre fold of Ugo Pericoli's book "Waterloo" which was written to go with the 1971 film. Paul and I