Hi
Another problem with Silica & Silicon. A recent update has brought a new item in called SILICONE..with an E. But no recipe is available to craft it, means, lubricant, engines, and some MK2 armour items are DEADLOCKED.
Previously the Engine and Silicon production was soft locked due to Silicon (no E) and Silicon(no E) Wafers, were required to make engines, but the filtration plant required four Engines. The Engine and Lubricant recipe now requires the new Silcon(e), though the Electronic Components, and other electronics still uses the Silicon Wafer. Which all makes sense!

With no Silicon Ore available in K2 + BZ (no space).
A suggestion would be a Silica or Quartz byproduct from Stone crushing. I.E Stone crushed = Sand 99% and 1% Silica or (1 %Quartz) that would solve the Engine/Filtration plant Softlock, and be fairly realistic from quarry crushing, and another byproduct to manage which is great!

Also - A new assembly plant recipe
Currently it's showing up as Copper + Silicon + Water = SILICONE made is assembly plant in the recipe book, but no option is actually available in an assembler.

Playing K2 2.0 with BZ Mods and additional recipes enabled.