This is a version 2 of the Death Star Wall Tiles models I had previously.  The first version were an assembly of remixed files that were later changed in licensing, and my remixes taken down.  So I model my own version of the tiles from scratch in Onshape and added some more tile designs including an additional cannon.  I've include screenshots from some of my onshape models incase makerworld tries to take this one down as well. Before take down, the 3 in has ~200 prints/downloads and the 6 in ~430 prints/downloads and 66 cumulative boosts so the models dependable and makes a great, striking project.

Profile 1: 
    - 6 by 6 in interchangeable tiles.
    - foundation of 10 mm base and upwards not exceeding 30 mm apart from the cannons

Profile 2:
    -3 by 3 in interchangeable tiles.
    -50% scale of profile 1

Plate Order for each profile:
    -1-8: 8 Trench Run Tiles
    -9 & 10: Cannons!
    -11-14: 4 Arch Filler Tiles (my faves!)
    -15-32: 20 Standard Filler Tiles
    -33-36: 8 half tiles (6 by 3, or 3 by 1.5)

My design contains enough tiles to make a 2 ft by 4 ft wall is display. It is completely modular with all the tiles being interchangeable. There is no Correct Order apart from keeping the trenches together if you want. For my layouts, the center row is the trench run. Above and below the trench run is a row of Filler Tiles and a row of Half Tiles. This way the trench run is centered. My display was glued to a 2 by 4' plywood sheet and framed. The 3in 3 by 4 tile display was super-glued together with no backing.

You can make it however you want in whatever size you want in 6 in or 3 in sized area.  

Here is a good X-Wing Star Wars Armada Model

Here is a good Tie-Fighter Star Wars Armada Model

Could double as a cat tree if built strong enough. Test at your own risk..