This is the "loving Factorization" thread, not the "puckering up for GregTech" thread. Factorization triples ores, without additives. No other mod does. Yes, FZ doesn't process lead ore. He has no lead ore in his worldgen, because from the FZ point of view, the lead you get from FZ silver production is enough to cover the requirements of the production lines and cabling. The blocks of lead you are stacking are coming from other mods.
ObFZlove:
The Solar Turbine (and really, how much silver and lead do you need once you have half of this built and wired back to the factory?)