diff --git a/LuaLibs/BeamLib.lua b/LuaLibs/BeamLib.lua
index 6cbebad..a4bc803 100644
--- a/LuaLibs/BeamLib.lua
+++ b/LuaLibs/BeamLib.lua
@@ -961,16 +961,36 @@ function BeamLib.ConvertBitIndexToRotationIndex( sBitIndexCombination)
    return nRotationIndex
 end
 
+-------------------------------------------------------------------------------------------------------------
+-- inverte la porzione tra nStartIndex e nEndIndex della tabella passata
+local function ReverseTablePortionInPlace( Table, nStartIndex, nEndIndex)
+   while nStartIndex < nEndIndex do
+      Table[nStartIndex], Table[nEndIndex] = Table[nEndIndex], Table[nStartIndex]
+      nStartIndex = nStartIndex + 1
+      nEndIndex = nEndIndex - 1
+   end
+
+   return Table
+end
+
+
 -------------------------------------------------------------------------------------------------------------
 -- reindicizza una tabella passata ripartendo dall'indice nStartIndex e mantenendo l'ordine
-function BeamLib.RotateTableFromIndex( Table, nStartIndex)
-    local RotatedTable = {}
+function BeamLib.RotateTableFromIndexInPlace( Table, nStartIndex)
+   local dLen = #Table
 
-    for i = 1, #Table do
-        RotatedTable[#RotatedTable + 1] = Table[((RotatedTable + i - 2) % #Table) + 1]
-    end
+   -- Nessuna rotazione necessaria se la tabella è vuota, ha 1 solo elemento, o la rotazione è dall'indice 1
+   if dLen <= 1 or nStartIndex <= 1 or nStartIndex > dLen then
+      return Table
+   end
 
-    return RotatedTable
+   local k = nStartIndex - 1
+
+   ReverseTablePortionInPlace( Table, 1, k)         -- 1. Inverte la parte inziale
+   ReverseTablePortionInPlace( Table, k + 1, dLen)  -- 2. Inverte la parte finale
+   ReverseTablePortionInPlace( Table, 1, dLen)      -- 3. Inverte tutto
+
+   return Table
 end
 
 -------------------------------------------------------------------------------------------------------------
diff --git a/StrategyLibs/BLADETOWASTE.lua b/StrategyLibs/BLADETOWASTE.lua
index bd80fb5..2afb658 100644
--- a/StrategyLibs/BLADETOWASTE.lua
+++ b/StrategyLibs/BLADETOWASTE.lua
@@ -845,7 +845,7 @@ local function CalculateDiceMachinings( vCuts, Parameters)
    local bReduceDiceDepth = Parameters.bReduceDiceDepth
 
    -- trimesh con RestLength
-   local idCheckCollisionTm = Part.idBoxTm
+   local idCheckCollisionTm = EgtCopyGlob( Part.idBoxTm, Part.idTempGroup)
    -- se testa o coda attaccate, si considerano nella superficie di collisione
    if bCannotSplitRestLength then
       local b3CheckCollision = BeamLib.GetPartBoxWithHeadTail( Part, sRestLengthSideForPreSimulation)