Make Casings and reinforced blocks transfer redstone signals

src/main/java/gregtech/common/blocks/GT_Material_Casings.java

@@ -13,6 +13,6 @@ public class GT_Material_Casings
     }
 
     public boolean isOpaque() {
-        return false;
+        return true;
     }
 }

src/main/java/gregtech/common/blocks/GT_Material_Reinforced.java

@@ -12,6 +12,6 @@ public class GT_Material_Reinforced
     }
 
     public boolean isOpaque() {
-        return false;
+        return true;
     }
 }