Hi! lava-from-stone (prototypes/stone-melting.lua:5, 1 stone -> 10 lava) reverses Linox's linox-recipe_stone-extraction (500 lava + 1 calcite -> 50 stone), and both allow productivity. With both mods and productivity in a foundry, stone multiplies each cycle (about x16 at +300%). Would allow_productivity = false on lava-from-stone be OK?
