diff --git a/me.lua b/me.lua
index 5bff605..030788f 100644
--- a/me.lua
+++ b/me.lua
@@ -8,6 +8,9 @@ me.recipes = {
   "temperature-sensor", "mlcc",
 }
 
+function me.byproduct()
+  return me.get_setting("bzgold-byproduct") and not me.get_setting("bz-no-byproduct")
+end
 
 function me.silver() 
   if me.get_setting("bz-all-intermediates") then return true end
diff --git a/prototypes/palladium.lua b/prototypes/palladium.lua
index b6e5f8c..56e646f 100644
--- a/prototypes/palladium.lua
+++ b/prototypes/palladium.lua
@@ -23,12 +23,17 @@ data:extend({
   {
     type = "recipe",
     name = "palladium-ingot",
+    main_product = "palladium-ingot",
     category = "smelting",
     order = "d[palladium-ingot]",
     enabled = false,
     energy_required = 1.6,
     ingredients = {{"palladium-powder", 1}},
-    results = {{"palladium-ingot", 1}},
+    results = util.me.byproduct() and
+    {
+      {type="item", name="palladium-ingot", amount=1, probability=0.95},
+      {type="item", name="sulfur", amount=1, probability=0.05},
+    } or  {{"palladium-ingot", 1}},
   },
 })
 data:extend({
diff --git a/prototypes/platinum.lua b/prototypes/platinum.lua
index d1fac20..9400255 100644
--- a/prototypes/platinum.lua
+++ b/prototypes/platinum.lua
@@ -23,12 +23,17 @@ data:extend({
   {
     type = "recipe",
     name = "platinum-ingot",
+    main_product = "platinum-ingot",
     category = "smelting",
     order = "d[platinum-ingot]",
     enabled = false,
     energy_required = 1.6,
     ingredients = {{"platinum-powder", 1}},
-    results = {{"platinum-ingot", 1}},
+    results = util.me.byproduct() and 
+    {
+      {type="item", name="platinum-ingot", amount=1, probability=0.95},
+      {type="item", name="sulfur", amount=1, probability=0.05},
+    } or {{"platinum-ingot", 1}},
   },
 })
 data:extend({
diff --git a/settings.lua b/settings.lua
index ff482b6..372b36e 100644
--- a/settings.lua
+++ b/settings.lua
@@ -5,14 +5,21 @@ data:extend({
 		setting_type = "startup",
 		default_value = "",
     allow_blank = true,
-    order = "a",
+    order = "a1",
 	},
   {
 		type = "bool-setting",
 		name = "bzgold-list",
 		setting_type = "startup",
     default_value = false,
-    order = "b",
+    order = "a2",
+	},
+  {
+		type = "bool-setting",
+		name = "bzgold-byproduct",
+		setting_type = "startup",
+    default_value = true,
+    order = "a3",
 	},
   {
     type = "bool-setting",
diff --git a/thumbnail.png b/thumbnail.png
index 957ccf9..d6bec24 100644
Binary files a/thumbnail.png and b/thumbnail.png differ
diff --git a/thumbnail.xcf b/thumbnail.xcf
index e53e0d0..b60ed8c 100644
Binary files a/thumbnail.xcf and b/thumbnail.xcf differ