Unit test errors with just MC Processing and prerequisites:

• Recipe "magnesium-pellet-smelting" makes "solid-calcium-chloride" (item), which is hidden.
• Recipe "casting-powder-depleted-uranium-3" requires "powder-aluminium" (item), which is hidden.
• Recipe "casting-powder-depleted-uranium-4" requires "powder-aluminium" (item), which is hidden.
• Technology "advanced-depleted-uranium-smelting-2" depends on "angels-aluminium-smelting-2", which is hidden.
• No (useful) recipe is using item "clowns-plate-magnesium" as an ingredient.

I also noticed that Ore Powderizer and Electrowinning Cell have no recipes.

A more general comment, that doesn't just apply to Special Vanilla:
Osmium Ore is very difficult to obtain. There's only one recipe to to obtain it, with a 1% chance. Before my changes, there was no way to obtain it.