diff --git a/EgtBEAMWALL.Core/MachGroupModel/MyMachGroupPanelM.vb b/EgtBEAMWALL.Core/MachGroupModel/MyMachGroupPanelM.vb
index 8b2f2fbb..8989b26a 100644
--- a/EgtBEAMWALL.Core/MachGroupModel/MyMachGroupPanelM.vb
+++ b/EgtBEAMWALL.Core/MachGroupModel/MyMachGroupPanelM.vb
@@ -180,7 +180,7 @@ Public Class MyMachGroupPanelM
             Dim RotArray(DuploList.Count) As Integer
             Dim FlipArray(DuploList.Count) As Integer
             DuploArray = DuploList.ToArray()
-            ' recupero ROT e FLIP per non perderli
+            ' recupero ROT (gradi) e FLIP (0/1) per non perderli
             For Duploindex = 0 To DuploArray.Length - 1
                EgtGetInfo(DuploArray(Duploindex), MGR_PRT_ROT, RotArray(Duploindex))
                EgtGetInfo(DuploArray(Duploindex), MGR_PRT_FLIP, FlipArray(Duploindex))
@@ -188,22 +188,22 @@ Public Class MyMachGroupPanelM
             ' aggiornamento dei Duplo
             EgtDuploUpdate(nPartId)
             ' recupero flip e rot dell'originale
-            Dim OrigRot As Integer
-            Dim OrigFlip As Integer
-            Dim DeltaRot As Integer
-            Dim DeltaFlip As Integer
-            EgtGetInfo(nPartId, BTL_PRT_ROTATED, OrigRot)
-            EgtGetInfo(nPartId, BTL_PRT_INVERTED, OrigFlip)
+            Dim dRotated As Double
+            Dim dInverted As Double
+            Dim dRotAng As Double
+            Dim dFlipAng As Double
+            EgtGetInfo(nPartId, BTL_PRT_ROTATED, dRotated)
+            EgtGetInfo(nPartId, BTL_PRT_INVERTED, dInverted)
             ' ripristino i valori di ROT e FLIP
             For Duploindex = 0 To DuploArray.Length - 1
                ' recupero box del pezzo
                Dim b3Part As New BBox3d
                EgtGetBBoxGlob(nPartId, GDB_BB.STANDARD, b3Part)
                ' faccio flip e rotazione rispetto all'originale che ha sovrascritto posizione del duplo
-               DeltaRot = RotArray(Duploindex) - OrigRot
-               EgtRotate(DuploArray(Duploindex), b3Part.Center, -Vector3d.Z_AX, DeltaRot)
-               DeltaFlip = FlipArray(Duploindex) - OrigFlip
-               EgtRotate(DuploArray(Duploindex), b3Part.Center, Vector3d.X_AX, DeltaFlip)
+               dRotAng = RotArray(Duploindex) - dRotated
+               EgtRotate(DuploArray(Duploindex), b3Part.Center, -Vector3d.Z_AX, dRotAng)
+               dFlipAng = FlipArray(Duploindex) * 180.0 - dInverted
+               EgtRotate(DuploArray(Duploindex), b3Part.Center, Vector3d.X_AX, dFlipAng)
                EgtSetInfo(DuploArray(Duploindex), MGR_PRT_ROT, RotArray(Duploindex))
                EgtSetInfo(DuploArray(Duploindex), MGR_PRT_FLIP, FlipArray(Duploindex))
             Next