Been struggling with oxygen, been using every recipe I see in NEI for LV era (there aren't many of them at 32 EU/t or less). Still can't keep any stored, I'm using it as fast as I can make it. How do you (or did you, way back when) generate oxygen for making your steel ingots?
I just made a MV Electrolyzer for making chrome from ruby, which gives me a nice oxygen boost, so don't be afraid to suggest an MV era process for oxygen if that's what you used. I can make MV machines now if needed. But I need oxygen badly.