diff --git a/LuaLibs/MachiningLib.lua b/LuaLibs/MachiningLib.lua
index ed176f6..8ab21d7 100644
--- a/LuaLibs/MachiningLib.lua
+++ b/LuaLibs/MachiningLib.lua
@@ -74,40 +74,34 @@ local function SetCurrMachineHeadType()
 end
 
 ---------------------------------------------------------------------
--- funzione che conferma e rende attivi testa e utensile ipotizzati
+-- setta ultimi testa e utensile utilizzati se compatibili con ottimizzazione testa
 local function ConfirmNextMachining()
-   -- se non definita testa successiva, esco
-   if not nNextMachHead or nNextMachHead < 1 or nNextMachHead > 2 then return end
-   -- altrimenti, la confermo come attiva
-   nActiveHead = nNextMachHead
-   if nNextMachHead == 1 then
-      H1_TOOL = H1_NEXT_TOOL
-   elseif nNextMachHead == 2 then
-      H2_TOOL = H2_NEXT_TOOL
+   -- utensile corrente
+   local sToolUuid = EgtMdbGetCurrMachiningParam( MCH_MP.TUUID)
+   local sToolName = EgtTdbGetToolFromUUID( sToolUuid or '')
+   EgtTdbSetCurrTool( sToolName or '')
+   -- testa dell'utensile corrente
+   local sHead = EgtTdbGetCurrToolParam( MCH_TP.HEAD)
+   local nHead = tonumber( sHead:sub( 2, #sHead)) + 0
+
+   if ( nHead < 10 and nHead >= 30) or vFixedHeads[nHead] then
+      -- testa che non richiede ottimizzazione
+      return
+   elseif nHead >= 20 then
+      nHead = 2
+   elseif nHead >= 10 then
+      nHead = 1
+   end
+
+   -- se la testa richiede ottimizzazione, confermo testa attiva
+   nActiveHead = nHead
+   if nActiveHead == 1 then
+      H1_TOOL = sToolName
+   elseif nActiveHead == 2 then
+      H2_TOOL = sToolName
    end
-   -- reset prossima testa
-   nNextMachHead = 0
-   H1_NEXT_TOOL = ''
-   H2_NEXT_TOOL = ''
 end
 
----------------------------------------------------------------------
--- funzione che traccia testa e utensile ipotizzati
-local function SetNextMachining( sToolName, nHead, bFixed)
-   if nHead < 1 or nHead > 2 then return end
-   if bFixed then
-      nNextMachHead = 0
-      H1_NEXT_TOOL = ''
-      H2_NEXT_TOOL = ''
-   end
-   nNextMachHead = nHead
-   if nHead == 1 then
-      H1_NEXT_TOOL = sToolName
-   elseif nHead == 2 then
-      H2_NEXT_TOOL = sToolName
-   end
-end
-   
 ---------------------------------------------------------------------
 local function SetCurrMachiningAndTool( Machining)
    EgtMdbSetCurrMachining( Machining.Name)
@@ -356,7 +350,7 @@ local function FindMachining( MachiningType, sType, Params, bTopHead, bDownHead,
    end
    if ( BEAM and BEAM.BW) or MachineHeadType == ONE_HEAD or MachineHeadType == TWO_EQUAL_HEADS or ( MachineHeadType == TWO_UP_DOWN_HEADS and not bDownHead) then
       _, sType = EgtEndsWith( sType, '_H2')
-   elseif not ( BEAM and BEAM.BW) and MachineHeadType == TWO_UP_DOWN_HEADS and bDownHead then
+   elseif not ( BEAM and BEAM.BW) and MachineHeadType == TWO_UP_DOWN_HEADS and not bTopHead and bDownHead then
       if not EgtEndsWith( sType, '_H2') then
          sType = sType .. '_H2'
       end
@@ -383,18 +377,15 @@ local function FindMachining( MachiningType, sType, Params, bTopHead, bDownHead,
          local bOk, ToolParams = VerifyTool( Machining, MachiningType, Params, bH2)
          if bOk then
             if MachineHeadUse == ONE_HEAD then
-               SetNextMachining( sToolName, 1, bFixed)
                return ReturnParams(MachiningType, Machining.Name, Machining.Type, ToolParams)
             elseif MachineHeadUse == TWO_EQUAL_HEADS then
                -- se nessuna testa attiva, prendo la prima lavorazione disponibile
                if nActiveHead == 0 then
-                  SetNextMachining( sToolName, EgtIf( bH2, 2, 1), bFixed)
                   return ReturnParams( MachiningType, Machining.Name, Machining.Type, ToolParams)
                -- verifico se posso usare lo stesso utensile della testa attiva
                elseif ( nActiveHead == 1 and not bH2 and sToolName == H1_TOOL) or ( nActiveHead == 2 and bH2 and sToolName == H2_TOOL) then
                -- se l'utensile sulla testa attiva è molto più piccolo rispetto a quelli salvati non lo scelgo
                   if ( not sH1Param or not sH1Param.TDiam or sH1Param.TDiam < dBiggerToolTolerance * ToolParams.TDiam) and ( not sH2Param or not sH2Param.TDiam or sH2Param.TDiam < 1.25 * ToolParams.TDiam) then
-                     SetNextMachining( sToolName, nActiveHead, bFixed)
                      return ReturnParams( MachiningType, Machining.Name, Machining.Type, ToolParams)
                   end
                end
@@ -414,10 +405,8 @@ local function FindMachining( MachiningType, sType, Params, bTopHead, bDownHead,
                end
             elseif MachineHeadUse == TWO_UP_DOWN_HEADS then
                if bTopHead and not bH2 then
-                  SetNextMachining( sToolName, 1, bFixed)
                   return ReturnParams( MachiningType, Machining.Name, Machining.Type, ToolParams)
                elseif bDownHead and bH2 then
-                  SetNextMachining( sToolName, 2, bFixed)
                   return ReturnParams( MachiningType, Machining.Name, Machining.Type, ToolParams)
                end
             end
@@ -428,31 +417,25 @@ local function FindMachining( MachiningType, sType, Params, bTopHead, bDownHead,
       -- se uno dei due utensili è molto più grande dell'altro scelgo quello senza fare altre analisi
       if sH1Mach ~= "" and sH1Param.TDiam and sH2Mach ~= "" and sH2Param.TDiam then
          if sH1Param.TDiam > dBiggerToolTolerance * sH2Param.TDiam then
-            SetNextMachining( sH1Tool, 1, bFixed)
             return ReturnParams( MachiningType, sH1Mach, sType, sH1Param)
          elseif sH2Param.TDiam > dBiggerToolTolerance * sH1Param.TDiam then 
-            SetNextMachining( sH2Tool, 2, bFixed)
             return ReturnParams( MachiningType, sH2Mach, sType, sH2Param)
          end
       end
       -- verifico se cambiare testa o cambiare utensile su quella corrente
       if nActiveHead == 1 then
          if sH2Mach ~= "" then
-            SetNextMachining( sH2Tool, 2, bFixed)
             return ReturnParams( MachiningType, sH2Mach, sType, sH2Param)
             --return sH2Mach, sH2Param.Type, sH2Param.TMaxMat, sH2Param.MaxToolLength, sH2Param.ToolDiam, sH2Param.DiamTh, sH2Param.FreeLen
          elseif sH1Mach ~= "" then
-            SetNextMachining( sH1Tool, 1, bFixed)
             return ReturnParams( MachiningType, sH1Mach, sType, sH1Param)
             --return sH1Mach, sH1Param.Type, sH1Param.TMaxMat, sH1Param.MaxToolLength, sH1Param.ToolDiam, sH1Param.DiamTh, sH1Param.FreeLen
          end
       elseif nActiveHead == 2 then
          if sH1Mach ~= "" then
-            SetNextMachining( sH1Tool, 1, bFixed)
             return ReturnParams( MachiningType, sH1Mach, sType, sH1Param)
             --return sH1Mach, sH1Param.Type, sH1Param.TMaxMat, sH1Param.MaxToolLength, sH1Param.ToolDiam, sH1Param.DiamTh, sH1Param.FreeLen
          elseif sH2Mach ~= "" then
-            SetNextMachining( sH2Tool, 2, bFixed)
             return ReturnParams( MachiningType, sH2Mach, sType, sH2Param)
             --return sH2Mach, sH2Param.Type, sH2Param.TMaxMat, sH2Param.MaxToolLength, sH2Param.ToolDiam, sH2Param.DiamTh, sH2Param.FreeLen
          end