More fixes

- Swivel bell vertex alpha (#721)
- Kodiak issues (#730, #729)
- T30 boattail specular (#722)

Distribution/Restock/GameData/ReStock/PatchesMH/Engine/restock-mh-engines-1875.cfg

@@ -278,7 +278,7 @@
       }
       NODES
       {
-        node_stack_bottom = 0.0, -1.292, 0.0, 0.0, -1.0, 0.0, 1
+        node_stack_bottom = 0.0, -1.3, 0.0, 0.0, -1.0, 0.0, 1
       }
     }
     VARIANT
@@ -453,7 +453,7 @@
       }
       NODES
       {
-        node_stack_bottom = 0.0, -1.292, 0.0, 0.0, -1.0, 0.0, 1
+        node_stack_bottom = 0.0, -1.3, 0.0, 0.0, -1.0, 0.0, 1
       }
     }
   }

Distribution/RestockPlus/GameData/ReStockPlus/Parts/Engine/1875/restock-engine-ursa.cfg

@@ -321,7 +321,7 @@ PART
 			}
 			NODES
 			{
-				node_stack_bottom = 0.0, -1.292, 0.0, 0.0, -1.0, 0.0, 1
+				node_stack_bottom = 0.0, -1.3, 0.0, 0.0, -1.0, 0.0, 1
 			}
 		}
     VARIANT
@@ -496,7 +496,7 @@ PART
       }
       NODES
       {
-        node_stack_bottom = 0.0, -1.292, 0.0, 0.0, -1.0, 0.0, 1
+        node_stack_bottom = 0.0, -1.3, 0.0, 0.0, -1.0, 0.0, 1
       }
     }
 	}