diff --git a/changelog.txt b/changelog.txt
index 3bbb90f..df360f6 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,4 +1,9 @@
 ---------------------------------------------------------------------------------------------------
+Version: 0.4.3
+Date: 2021-05-21
+  Features: 
+    - Add option for lead in sulfuric acid introduced on 0.4.0. To be removed in 2022
+---------------------------------------------------------------------------------------------------
 Version: 0.4.2
 Date: 2021-05-21
   Features:
diff --git a/info.json b/info.json
index 9d6c74e..90b5c90 100644
--- a/info.json
+++ b/info.json
@@ -1,6 +1,6 @@
 {
     "name": "bzlead",
-    "version": "0.4.2",
+    "version": "0.4.3",
     "factorio_version": "1.1",
     "title": "Lead",
     "author": "Brevven",
diff --git a/lead-recipe-updates.lua b/lead-recipe-updates.lua
index e0277f9..352f51f 100644
--- a/lead-recipe-updates.lua
+++ b/lead-recipe-updates.lua
@@ -7,7 +7,12 @@ if (not mods["pyrawores"] and not mods["bobplates"] and not mods["angelssmelting
   util.replace_ingredient("pipe-to-ground", "iron-plate", "lead-plate")
   util.replace_some_ingredient("storage-tank", "iron-plate", "lead-plate", 10)
   util.replace_ingredient("battery", "iron-plate", "lead-plate")
-  util.replace_ingredient("sulfuric-acid", "iron-plate", "lead-plate")
+
+  
+  if util.sulfuric() then
+    util.replace_ingredient("sulfuric-acid", "iron-plate", "lead-plate")
+  end
+
   util.replace_ingredient("uranium-fuel-cell", "iron-plate", "lead-plate")
   util.replace_some_ingredient("gun-turret", "iron-plate", "lead-plate", 5)
 
diff --git a/locale/en/lead.cfg b/locale/en/lead.cfg
index 4e26983..9ad0d33 100644
--- a/locale/en/lead.cfg
+++ b/locale/en/lead.cfg
@@ -40,7 +40,9 @@ dirty-water-filtration-lead=Filter dirty water, giving lead ore [item=lead-ore],
 # Settings
 
 [mod-setting-name]
-bzlead-more-entities=Experimental: Lead entities
+bzlead-more-entities=Lead entities
+bzlead-sulfuric=Use lead in sulfuric acid. Default "yes". Use with care.
 
 [mod-setting-description]
-bzlead-more-entities=Adds lead entities (currently just a lead chest). Currently "experimental", long-term support not guaranteed.
+bzlead-more-entities=Adds lead entities (currently just a lead chest).
+bzlead-sulfuric=Adds compatibility for old saves. Do NOT change to "no" for new saves. Will be removed (and always "yes") in 2022.
diff --git a/settings.lua b/settings.lua
index 9573acc..4d6faf5 100644
--- a/settings.lua
+++ b/settings.lua
@@ -7,4 +7,11 @@ data:extend(
 		default_value = "no",
     allowed_values = {"yes", "no"},
 	},
+  { -- TODO remove this in 2022
+		type = "string-setting",
+		name = "bzlead-sulfuric",
+		setting_type = "startup",
+		default_value = "yes",
+    allowed_values = {"yes", "no"},
+	},
 })
diff --git a/util.lua b/util.lua
index 9e05cbb..f1ce58b 100644
--- a/util.lua
+++ b/util.lua
@@ -14,6 +14,10 @@ function util.more_entities()
   return util.get_setting("bzlead-more-entities") == "yes"
 end
 
+function util.sulfuric()
+  return util.get_setting("bzlead-sulfuric") == "yes"
+end
+
 function util.get_stack_size(default) 
   if mods["Krastorio2"] then
     size = tonumber(krastorio.general.getSafeSettingValue("kr-stack-size"))