diff --git a/LuaLibs/ProcessLongDoubleCut.lua b/LuaLibs/ProcessLongDoubleCut.lua
index 4813d7d..3e7adb8 100644
--- a/LuaLibs/ProcessLongDoubleCut.lua
+++ b/LuaLibs/ProcessLongDoubleCut.lua
@@ -1132,8 +1132,17 @@ function ProcessLong2Cut.Make( Proc, nPhase, nRawId, nPartId, bForcedBladeMaster
    elseif ( nSide ~= -1 or BD.DOWN_HEAD or BD.TURN) and nUseMillOnSide == 0 then
       -- determino la massima elevazione
       local dElev = 0
-      local dFacElev1 = BL.GetFaceElevation( Proc, tFaceLong[1], b3Solid)
-      local dFacElev2 = BL.GetFaceElevation( Proc, tFaceLong[2], b3Solid)
+
+      -- calcolo l'elevazione della faccia principale
+      local dFacElev1 = BL.GetFaceElevation( Proc, tFaceLong[vOrd[1]], b3Solid)
+      local dFacElev2 = BL.GetFaceElevation( Proc, tFaceLong[vOrd[2]], b3Solid)
+      local bFacesSwapped = false
+      if bInt and not bConvex and dFacElev1 - 10* GEO.EPS_SMALL > dFacElev2 then
+         vOrd[1], vOrd[2] = vOrd[2], vOrd[1]
+         dFacElev1, dFacElev2 = dFacElev2, dFacElev1
+         bFacesSwapped = true
+      end
+
       -- se facce concave e a 90 gradi, prendo l'elevazione minima
       if bOrtho then
          dElev = min( dFacElev1, dFacElev2)
@@ -1174,10 +1183,10 @@ function ProcessLong2Cut.Make( Proc, nPhase, nRawId, nPartId, bForcedBladeMaster
       -- se chiuso e corto, applico svuotatura con fresa opportuna
       if nFaceLimit == 3 and Proc.Box:getDimX() < 2 * dToolDiam then
          -- svuotatura della prima faccia longitudinale
-         local bOk, sErr = MakeByPocketing( Proc, nPhase, nRawId, nPartId, nSide, tFaceLong[1], dFacElev1)
+         local bOk, sErr = MakeByPocketing( Proc, nPhase, nRawId, nPartId, nSide, tFaceLong[vOrd[1]], dFacElev1)
          -- svuotatura della seconda faccia longitudinale
          if not bOk then return bOk, sErr end
-         return MakeByPocketing( Proc, nPhase, nRawId, nPartId, nSide, tFaceLong[2], dFacElev2)
+         return MakeByPocketing( Proc, nPhase, nRawId, nPartId, nSide, tFaceLong[vOrd[2]], dFacElev2)
       end
       -- determino gli estremi
       local dStartDist = 0
@@ -1381,6 +1390,9 @@ function ProcessLong2Cut.Make( Proc, nPhase, nRawId, nPartId, bForcedBladeMaster
                   EgtOutLog( sErr)
                   return false, sErr
                end
+               if bFacesSwapped then
+                  dSal, dEal = dEal, dSal
+               end
                -- aggiungo geometria
                EgtSetMachiningGeometry( {{ Proc.Id, tFaceLong[vOrd[i]]}})
                -- limito opportunamente la lavorazione
@@ -1545,6 +1557,12 @@ function ProcessLong2Cut.Make( Proc, nPhase, nRawId, nPartId, bForcedBladeMaster
          -- calcolo l'elevazione della faccia principale
       local dFacElev1 = BL.GetFaceElevation( Proc, tFaceLong[vOrd[1]], b3Solid)
       local dFacElev2 = BL.GetFaceElevation( Proc, tFaceLong[vOrd[2]], b3Solid)
+      local bFacesSwapped = false
+      if bInt and not bConvex and dFacElev1 - 10* GEO.EPS_SMALL > dFacElev2 then
+         vOrd[1], vOrd[2] = vOrd[2], vOrd[1]
+         dFacElev1, dFacElev2 = dFacElev2, dFacElev1
+         bFacesSwapped = true
+      end
       -- se fresa di fianco o da sotto calcolo quanto l'utensile può andare vicino al limite se l'elevazione della faccia è minore del raggio utensile
       if nUseMillOnSide <= 1 or nSide == -1 then
          local dFacElev = max( dFacElev1, dFacElev2)
@@ -1725,7 +1743,7 @@ function ProcessLong2Cut.Make( Proc, nPhase, nRawId, nPartId, bForcedBladeMaster
                local ptC3 = EgtSurfTmFacetCenter( Proc.Id, tFaceLong[vOrd[i]], GDB_ID.ROOT) 
                local ptDir = ptC3 - ptM ; ptDir:normalize()
                -- se concave e dal versore Z  della faccia (> -20°) o convesso e versore Z ( > -30°) decido se eseguire la lavoraione con la testa da sopra o da sotto  
-               if ( not bConvex and vtN[vOrd[i]]:getZ() > -0.9397 and ptDir:getZ() > 0) or
+               if ( not bConvex and vtN[vOrd[i]]:getZ() > -0.9397 and ptDir:getZ() > -0.017) or
                   ( bConvex and vtN[vOrd[i]]:getZ() > -0.866  and ptDir:getZ() > 0) then
                   sNameF = sPrefix .. ( EgtGetName( Proc.Id) or tostring( Proc.Id)) .. '_' .. tostring( nM)
                   nMchFId = EgtAddMachining( sNameF, sMilling)
@@ -1833,6 +1851,14 @@ function ProcessLong2Cut.Make( Proc, nPhase, nRawId, nPartId, bForcedBladeMaster
                   EgtSetMachiningParam( MCH_MP.FACEUSE, vFaceUse[vOrd[i]])
                end
             end
+
+            if bFacesSwapped then
+               local dCurrStartAddLen = EgtGetMachiningParam( MCH_MP.STARTADDLEN)
+               local dCurrEndAddLen = EgtGetMachiningParam( MCH_MP.ENDADDLEN)
+               EgtSetMachiningParam( MCH_MP.STARTADDLEN, dCurrEndAddLen)
+               EgtSetMachiningParam( MCH_MP.ENDADDLEN, dCurrStartAddLen)
+            end
+
             -- imposto lato di lavoro e inversione
             EgtSetMachiningParam( MCH_MP.WORKSIDE, EgtIf( bIsMachDownUp, MCH_MILL_WS.RIGHT, MCH_MILL_WS.LEFT))
             EgtSetMachiningParam( MCH_MP.INVERT, true)