Well, I haven't been quite
that busy, but a few more maps for the pool:
Anvilwood has most of the sustainable metal production on the ridge along the bottom and left sides of the map, but make sure you get your fair share of the rocks in the middle of the map to jump-start your economy.
Cobalt Dream is a diagonal-starts rectangular flat map similar to Alien Desert, but with metal distribution and heightmap a little more like Red Comet. It's fairly hot off the press and its texture and precise metal distribution might still need some tweaks.