I have restarted my 40k scale Leviathan project. The first one was a little undersized and I only got the basic shape done. The new one should be spot on, well at least to me.
3 sets of Baneblade tracks, 3 sheets of 18" x 24" x 1/8" acrylic and a pile of GW city terrain sets.
Here is the epic model I'm using for the basis - Image belongs to Kaptain Kobold on flicker