[Lazy_Perfectionist]

That's nice to hear. But w/regards to that last paragraph, there may be an easier, though less accurate way to do that which would avoid the complication of removing units from the game.(though some nations such as Ctis would complicate things). If you can combine all three eras into one nation, say EA, MA, LA ulm into Single Era Ulm, and have three different mod versions of SE Ulm with all units available. In one version, you'd have the resource costs for EA normal, but the other two eras ridiculously high. The next version, you'd have MA normal, and so on. In theory, this would allow you to keep some of your heroes and commanders throughout the ages and offer up some real interesting strategies, since they'd no longer be recruitable later on. And if you wanted to force obsolescence you could invite glitchs by lowering max ages.

That'd still take a lot of work, but hopefully less on the part of gameplayers. If I find the time, I'll look into that. But I've got other things on my plate, ATM, namely, my first Dom3 MP game, server courtesy of the llamabeast, and finishing my godawfully large MA Agartha guide.