As promised, here is the finished item. The template downloaded from Confessions of a 40K Addict (templates here) is excellent. I printed it a larger size to make a landing pad sort of affair. The only adjustment I had to make is 2 layers of foamboard for the base/floor to build it up so that Space Marines didn't have to go on tiptoes to see over the wall! Check out the photo and don't forget to head over to 40K Addict and check out Dave's excellent blog.