Nicely done! I actually am going to pick up a few of the O8 hexes now that Picoarmor is holding them and use them as a base for similar things. Or possibly as bits for one-off special terrain projects, like Mars or the Amazon Combat Zone. I have a bit of Terrainmaker foam left that would fit the purpose for ground buildups.
By the way, I took a shot at skirts on a pack of Bulldogs, but I’m not totally sure the effect worked as well as yours. I have some DN M41s on order though. Oh, and I also settled on the Induna FSV as my Combine Heavy Tank. Base-coated them and about a battalion’s worth of Paneuropean hovercraft this evening.