I have just arranged and spray painted my collection of GW Campaign Tiles ( https://www.google.com/search?q=Warhammer+campaign+tiles&hl=en&client=firefox-a&hs=ZSR&tbo=u&rls=org.mozilla:en-US:official&tbm=isch&source=univ&sa=X&ei=yIYNUfLyD8G1iwLW6oG4Bw&ved=0CDoQsAQ&biw=1516&bih=893 )
I have a combination of the 40K and the Fantasy tiles and they are fantastic for building custom campaign maps. They are large enough to move minis on for Army counters! I plan on using these in a Heavy Gear Campaign someday so I can replicate more of the Inter polar wars or Earth Invasions. In the distant future, I want to play out a Renegade Legion planetary assault. Fantastic dreams, but maybe ...someday... They are also double sided allowing you plenty of flexibility and break down and can be stored in a small box. Im not sure why these are not as popular as they could be. Pictures soon.