Hi, loving those headgear designs. I think the viewpoint is a bit confusing in the tank/mech sketch. It's not clear whether the tank is going down hill or the carrier on an upward slope, or if the horizon is tilted at about 30* and they're both on level ground. It's a bit like those places where people think stuff rolls uphill, but it's really an illusion because the trees are growing at an odd angle.
Automatic cigarette lighter is cool :o