<disclaimer>This post is not a question about release date, nor a complaint nor anything similar. Don't read more into it that is written below.</disclaimer>
I would really like to start a new world with MC 1.5.1. All my favorite mods are out, except for IC2. But I was thinking, I could use the current-in-development version just as a placeholder, so it generates all it's ores, claims it's blocks and items ids etc. So when a stable (or beta or whatever playable) version comes out, I just substitute and go on playing.
So, my question is: how stable is the mod as long as I don't actually use any mod-specific items? Just gather the ores (and lots and lots of lava, hehe), build the house and do some other boring things to prepare a nice map for me to play?
(I'm also thinking about adding GregTech. Used to play it, then got annoyed by constant changes, but maybe I should try it again? The same question goes.)
And please, spare me the suggestions about tools that can prune chunks, so they regenerate with new ores. I know they exists. I don't like to use them. If I dig a tunnel, I want it to stay there