The Industrial Terrain from GrimDark Terrain is compatible with 6-8 mm Epic Sci-Fi games. It fits perfectly into your terrain. Whether Warhammer 40K or other sci-fi tabletop games, it simply fits many settings.The bucket wheel excavator consists of 41 parts and measures 300x150x155mm.You need a total of 16 round magnets with a diameter of 5mm and a thickness of 1mm and 4 round magnets with a diameter of 5mm and a thickness of 2mm.You can find assembly instructions here:
https://grimdarkterrain.com/template-construct/stc-excavator-maioris/
We have many other terrain models and also Greebles/Bitz on offer. Just take a look around.