1. Sorry but denied. Thats the high price for compactness.
2. It seems a bit too unrealistic to me as the Transparency would be lost when using Iridiumplates, also this is to prevent Nucleareactors from exploding your Base, and not really a Buildingblock.
3. I choose Monoxides Name for it.
4. Whats so bad about the retextured Lapisblock? Make a Texturepack if you really need it.
Mkay, can you at least then put the fortune enchantment support for the Iridium Ore, so it gives number of Iridium depending on the level, instead of always giving 1? I think the same should be done to Uranium Ore, because Fortune is usually hard to get.