Fix negative masses on engine plates in KSP 1.8.x

see #853

Distribution/Restock/GameData/ReStock/PatchesMH/Coupling/restock-mh-engineplates.cfg

@@ -16,6 +16,13 @@
     texture = blank, ReStock/Assets/Structural/restock-structural-tubes-1
     texture = blank-n, ReStock/Assets/Structural/restock-structural-tubes-1-n
   }
+
+  // this is the same as the stock value in KSP 1.9.x, but since KSP 1.8.x 
+  // has different mass values, the variant masses below result in negative mass.
+  // This prevents that from happening, at the expense of slightly affecting part balance
+  // when ReStock is used with 1.8.x
+  @mass = 0.14 
+
   !MODULE[ModulePartVariants] {}
   MODULE
   {
@@ -449,6 +456,13 @@
     texture = blank, ReStock/Assets/Structural/restock-structural-tubes-1
     texture = blank-n, ReStock/Assets/Structural/restock-structural-tubes-1-n
   }
+
+  // this is the same as the stock value in KSP 1.9.x, but since KSP 1.8.x 
+  // has different mass values, the variant masses below result in negative mass.
+  // This prevents that from happening, at the expense of slightly affecting part balance
+  // when ReStock is used with 1.8.x
+  @mass = 0.25
+
   !MODULE[ModulePartVariants] {}
   MODULE
   {
@@ -978,6 +992,13 @@
     texture = blank, ReStock/Assets/Structural/restock-structural-tubes-1
     texture = blank-n, ReStock/Assets/Structural/restock-structural-tubes-1-n
   }
+
+  // this is the same as the stock value in KSP 1.9.x, but since KSP 1.8.x 
+  // has different mass values, the variant masses below result in negative mass.
+  // This prevents that from happening, at the expense of slightly affecting part balance
+  // when ReStock is used with 1.8.x
+  @mass = 0.58
+
   !MODULE[ModulePartVariants] {}
   MODULE
   {
@@ -1411,6 +1432,13 @@
     texture = blank, ReStock/Assets/Structural/restock-structural-tubes-1
     texture = blank-n, ReStock/Assets/Structural/restock-structural-tubes-1-n
   }
+
+  // this is the same as the stock value in KSP 1.9.x, but since KSP 1.8.x 
+  // has different mass values, the variant masses below result in negative mass.
+  // This prevents that from happening, at the expense of slightly affecting part balance
+  // when ReStock is used with 1.8.x
+  @mass = 1.0
+
   !MODULE[ModulePartVariants] {}
   MODULE
   {

Distribution/Restock/changelog.txt

@@ -1,6 +1,7 @@
 v1.1.2
 ------
 - Fixed engine plate compatability with stock vessels by moving boattails to the end of the variant list
+- Fixed engine plate negative masses when used in KSP 1.8.x by setting the part mass to the 1.9.x values. This comes at the expense of affecting part balance when used in 1.8.x.
 
 v1.1.1
 ------