diff --git a/me.lua b/me.lua
index 030788f..e56de61 100644
--- a/me.lua
+++ b/me.lua
@@ -12,6 +12,10 @@ function me.byproduct()
   return me.get_setting("bzgold-byproduct") and not me.get_setting("bz-no-byproduct")
 end
 
+function me.lead_byproduct()
+  return me.get_setting("bzlead-byproduct") and not me.get_setting("bz-no-byproduct")
+end
+
 function me.silver() 
   if me.get_setting("bz-all-intermediates") then return true end
   return me.get_setting("bzgold-silver")
diff --git a/prototypes/gold.lua b/prototypes/gold.lua
index 393e50b..513145b 100644
--- a/prototypes/gold.lua
+++ b/prototypes/gold.lua
@@ -1,5 +1,14 @@
 local util = require("data-util");
 
+local results = {{"gold-ingot", 1}}
+
+if util.me.silver() and util.me.byproduct() then
+  results = {
+    {type = "item", name="gold-ingot", amount=1, probability=.9},
+    {type = "item", name="silver-ore", amount=1, probability=.1},
+  }
+end
+
 data:extend({
   {
     type = "item",
@@ -13,12 +22,13 @@ data:extend({
   {
     type = "recipe",
     name = "gold-ingot",
+    main_product = "gold-ingot",
     category = "smelting",
     order = "d[gold-ingot]",
     enabled = false,
     energy_required = 1.6,
     ingredients = {{"gold-ore", 1}},
-    results = {{"gold-ingot", 1}},
+    results = results,
   },
   {
     type = "technology",
diff --git a/prototypes/recipe-updates.lua b/prototypes/recipe-updates.lua
index b8b9051..8b773ed 100644
--- a/prototypes/recipe-updates.lua
+++ b/prototypes/recipe-updates.lua
@@ -1,5 +1,11 @@
 local util = require("data-util")
 
+-- K2 silver from copper
+if mods.Krastorio2 then
+  util.replace_some_product("copper-plate", "copper-plate", 1, "silver-ore", 1)
+  util.add_product("enriched-copper", {"silver-ore", 1})
+end
+
 if mods.bztitanium then
   util.replace_ingredient("heat-exchanger", util.titanium_plate, "titanium-palladium-flange")
   util.replace_some_ingredient("steam-turbine", util.titanium_plate, 10, "titanium-palladium-flange", 10)
diff --git a/prototypes/silver.lua b/prototypes/silver.lua
index 88dc9b3..d076cdc 100644
--- a/prototypes/silver.lua
+++ b/prototypes/silver.lua
@@ -118,4 +118,21 @@ if util.me.silver() then
       order = "b-b",
     },
   })
+
+  -- replace lead byproducts, set copper byproducts
+  util.set_main_product("copper-plate", "copper-plate")
+  if mods.bzlead and util.me.lead_byproduct() then
+    util.replace_product("lead-plate", "copper-ore", "silver-ore")
+    util.replace_product("enriched-lead", "copper-ore", "silver-ore")
+
+    -- small silver byproduct on copper, even if lead is enabled
+    if not mods.Krastorio2 and util.me.byproduct() then
+      util.add_product("copper-plate", {type=item, name="silver-ore", amount=1, probability=0.1})
+    end
+  else
+    if not mods.Krastorio2 then
+      util.multiply_recipe("copper-plate", 4)
+      util.replace_some_product("copper-plate", "copper-plate", 1, "silver-ore", 1)
+    end
+  end
 end