diff --git a/PHI-CL/data/b/gm-vp-c.lua b/PHI-CL/data/b/gm-vp-c.lua
index 6714077..8c762f4 100644
--- a/PHI-CL/data/b/gm-vp-c.lua
+++ b/PHI-CL/data/b/gm-vp-c.lua
@@ -302,7 +302,7 @@ local items = {
         },
         ['steel-plate-productivity'] = {
             prerequisites = {'foundry'},
-            effects = {{type = 'change-recipe-productivity', recipe = 'steel-plate', change = 0.05}}
+            effects = {{type = 'change-recipe-productivity', recipe = 'steel-plate', change = 0.05}, {type = 'change-recipe-productivity', recipe = 'casting-steel', change = 0.05}}
         },
         ['low-density-structure-productivity'] = {
             prerequisites = {'low-density-structure', 'electromagnetic-plant'},
diff --git a/PHI-CL/data/b/gm-vp.lua b/PHI-CL/data/b/gm-vp.lua
index 984e182..1e08a1e 100644
--- a/PHI-CL/data/b/gm-vp.lua
+++ b/PHI-CL/data/b/gm-vp.lua
@@ -169,11 +169,6 @@ for _, v in pairs({'processing-unit-productivity', 'steel-plate-productivity', '
     end
 end
 
--- GM-VP A 1 SPACE_AGE RESEARCH_EFFECT
-if data.raw.technology['steel-plate-productivity'] then
-    data.raw.technology['steel-plate-productivity'].effects = {{type = 'change-recipe-productivity', recipe = 'steel-plate', change = 0.05}, {type = 'change-recipe-productivity', recipe = 'casting-steel', change = 0.05}}
-end
-
 -- GM-VP C 1 SPACE_AGE RESEARCH
 if data.raw.technology['research-productivity'] and data.raw.technology['research-productivity'].unit then
     data.raw.technology['research-productivity'].unit.count_formula = '1500 * (1.5 ^ L)'