I created a version of this set a long time ago, when I first started 3d modelling for my gaming table. I had a request to modify the original files and when I revisited the project I simply couldn't stop my self from completly reworking the files from scratch. This version cleans up the original design, adds more modular elements, and adds a much better connection system to link everything together. You can use a simple tab system, or insert a small 5mm magnetic ball.
Also included are a couple barricades to match the trench system.