Those are some pretty nice models 
I plan to do some of my own for the project (as i stated in my last post), but as yet, I haven’t gotten hold of a full license of Maya (should i go for the creative suite? As that would give me Mudbox and MotionBuilder too, though i’ve never used the latter)
One thing i’ve wondered about UE4 for for a while now in regards to RTS games (and some i’ve played in the past), how would we implement custom Navigation meshes? Such as units walking on walls, building roofs, standing on towers, or on the decks of ships? (Rise and Fall: Civilization At War had this feature), I know you can add a custom collision mesh, but what about custom nav meshes?