diff --git a/Icarus/MachiningDb/Machining.vb b/Icarus/MachiningDb/Machining.vb
index 7cad6b6..9dff72c 100644
--- a/Icarus/MachiningDb/Machining.vb
+++ b/Icarus/MachiningDb/Machining.vb
@@ -953,6 +953,10 @@ Public Class ComboMachiningParam
       End Get
    End Property
 
+   Sub New(Type As Params)
+      MyBase.New(Type)
+   End Sub
+
    Sub New(Type As Params, nIndex As Integer)
       MyBase.New(Type)
       If nIndex = 0 Then
@@ -1084,6 +1088,10 @@ Public Class CheckMachiningParam
       End Get
    End Property
 
+   Sub New(Type As Params)
+      MyBase.New(Type)
+   End Sub
+
    Sub New(Type As Params, nIndex As Integer)
       MyBase.New(Type)
       If nIndex = 0 Then
diff --git a/Icarus/RibParamPanel/RibParamPanelV.xaml b/Icarus/RibParamPanel/RibParamPanelV.xaml
index fa2d9a6..31df7b4 100644
--- a/Icarus/RibParamPanel/RibParamPanelV.xaml
+++ b/Icarus/RibParamPanel/RibParamPanelV.xaml
@@ -58,7 +58,7 @@
                            <Button Grid.Column="2"
                                     Content="R"
                                     Command="{Binding ResetParam_Command}"
-                                    IsEnabled="{Binding bIsModifiedFromDb}"
+                                    IsEnabled="{Binding bIsModifiedFromPart}"
                                     VerticalContentAlignment="Center"
                                     HorizontalContentAlignment="Center"
                                     Margin="5,0,0,0"
@@ -80,7 +80,7 @@
                            <Button Grid.Column="2"
                                     Content="R"
                                     Command="{Binding ResetParam_Command}"
-                                    IsEnabled="{Binding bIsModifiedFromDb}"
+                                    IsEnabled="{Binding bIsModifiedFromPart}"
                                     VerticalContentAlignment="Center"
                                     HorizontalContentAlignment="Center"
                                     Margin="5,0,0,0"
diff --git a/Icarus/RibParamPanel/RibParamPanelVM.vb b/Icarus/RibParamPanel/RibParamPanelVM.vb
index 3e67d98..036eeb3 100644
--- a/Icarus/RibParamPanel/RibParamPanelVM.vb
+++ b/Icarus/RibParamPanel/RibParamPanelVM.vb
@@ -41,12 +41,13 @@ Public Class RibParamPanelVM
 
       m_Type = Cathegories.RIBS
       m_sName = "Ribs"
-      m_MachiningParamList = New List(Of MachiningParam)({New RibNumericMachiningParam(MachiningParam.Params.RIBSOVERLAP, nRibId, nPartId),
+      m_MachiningParamList = New List(Of MachiningParam)({New RibComboMachiningParam(MachiningParam.Params.RIBSTYPE, nRibId, nPartId),
+                                                          New RibNumericMachiningParam(MachiningParam.Params.RIBSOVERLAP, nRibId, nPartId),
                                                           New RibNumericMachiningParam(MachiningParam.Params.RIBSSTRANDCOUNT, nRibId, nPartId),
-                                                          New RibNumericMachiningParam(MachiningParam.Params.RIBSINVERTDIRECTION, nRibId, nPartId),
-                                                          New RibNumericMachiningParam(MachiningParam.Params.RIBSLEADININVERT, nRibId, nPartId),
+                                                          New RibCheckMachiningParam(MachiningParam.Params.RIBSINVERTDIRECTION, nRibId, nPartId),
+                                                          New RibCheckMachiningParam(MachiningParam.Params.RIBSLEADININVERT, nRibId, nPartId),
                                                           New RibNumericMachiningParam(MachiningParam.Params.RIBSLEADINLEN, nRibId, nPartId),
-                                                          New RibNumericMachiningParam(MachiningParam.Params.RIBSLEADOUTINVERT, nRibId, nPartId),
+                                                          New RibCheckMachiningParam(MachiningParam.Params.RIBSLEADOUTINVERT, nRibId, nPartId),
                                                           New RibNumericMachiningParam(MachiningParam.Params.RIBSLEADOUTLEN, nRibId, nPartId),
                                                           New RibNumericMachiningParam(MachiningParam.Params.RIBSLEADOUTCOASTING, nRibId, nPartId),
                                                           New RibNumericMachiningParam(MachiningParam.Params.RIBSLEADOUTWIPE, nRibId, nPartId),
@@ -70,9 +71,21 @@ Public Class RibParamPanelVM
    Friend Sub WriteParamsInRib(nRibId As Integer)
       ' se parametri modificati
       Dim bModified As Boolean = False
-      For Each Param As RibNumericMachiningParam In m_MachiningParamList
-         If Param.bIsModified AndAlso Not bModified Then bModified = True
-         Param.WriteParamInRib(nRibId)
+      For Each Param In m_MachiningParamList
+         Select Case Param.GetType()
+            Case GetType(RibNumericMachiningParam)
+               Dim NumericParam As RibNumericMachiningParam = TryCast(Param, RibNumericMachiningParam)
+               If NumericParam.bIsModified AndAlso Not bModified Then bModified = True
+               NumericParam.WriteParamInRib(nRibId)
+            Case GetType(RibComboMachiningParam)
+               Dim ComboParam As RibComboMachiningParam = TryCast(Param, RibComboMachiningParam)
+               If ComboParam.bIsModified AndAlso Not bModified Then bModified = True
+               ComboParam.WriteParamInRib(nRibId)
+            Case GetType(RibCheckMachiningParam)
+               Dim CheckParam As RibCheckMachiningParam = TryCast(Param, RibCheckMachiningParam)
+               If CheckParam.bIsModified AndAlso Not bModified Then bModified = True
+               CheckParam.WriteParamInRib(nRibId)
+         End Select
       Next
       If bModified Then
          ' Imposto flag di ricalcolo slice
@@ -324,4 +337,226 @@ Public Class RibNumericMachiningParam
 
 #End Region    ' COMMANDS
 
+End Class
+
+Public Class RibComboMachiningParam
+   Inherits ComboMachiningParam
+
+   Public Overrides Property SelValue As IdNameStruct
+      Get
+         Return m_SelValue
+      End Get
+      Set(value As IdNameStruct)
+         m_SelValue = value
+         NotifyPropertyChanged(NameOf(SelValue))
+         NotifyPropertyChanged(NameOf(bIsModifiedFromPart))
+      End Set
+   End Property
+
+   Protected m_PartSelValue As IdNameStruct
+   Public ReadOnly Property PartSelValue As IdNameStruct
+      Get
+         Return m_PartSelValue
+      End Get
+   End Property
+
+   Public ReadOnly Property bIsModifiedFromPart As Boolean
+      Get
+         Return m_SelValue.Id <> m_PartSelValue.Id
+      End Get
+   End Property
+
+   ' Definizione comandi
+   Private m_cmdResetParam As ICommand
+
+   Sub New(Type As Params, nRibId As Integer, nPartId As Integer)
+      MyBase.New(Type)
+      Dim bReadFromRib As Boolean = False
+      Dim bReadFromPart As Boolean = False
+      Select Case Type
+         Case Params.RIBSTYPE
+            m_ValueList = New List(Of IdNameStruct)({New IdNameStruct(Machining.MPAR_RIBSTYPE.INTERNAL, "Internal"),
+                                                     New IdNameStruct(Machining.MPAR_RIBSTYPE.EXTERNAL, "External"),
+                                                     New IdNameStruct(Machining.MPAR_RIBSTYPE.UNBOUNDED, "Unbounded")})
+            Dim nSelValue As Integer = 1
+            bReadFromRib = EgtGetInfo(nRibId, MAC_RIBSTYPE, nSelValue)
+            If bReadFromRib Then
+               m_SelValue = m_ValueList.FirstOrDefault(Function(x) x.Id = nSelValue)
+            End If
+            bReadFromPart = EgtGetInfo(nPartId, MAC_RIBSTYPE, nSelValue)
+            m_PartSelValue = m_ValueList.FirstOrDefault(Function(x) x.Id = nSelValue)
+      End Select
+      m_OrigSelValue = m_SelValue
+      If Not bReadFromRib Then
+         If bReadFromPart Then
+            m_SelValue = m_PartSelValue
+            m_OrigSelValue = m_PartSelValue
+         ElseIf Type = Params.RIBSTYPE Then
+            m_OrigSelValue = m_ValueList.FirstOrDefault(Function(x) x.Id = Machining.MPAR_RIBSTYPE.INTERNAL)
+            m_SelValue = m_OrigSelValue
+         End If
+      End If
+   End Sub
+
+   Friend Sub WriteParamInRib(nRibId As Integer)
+      Select Case Type
+         Case Params.RIBSTYPE
+            If bIsModifiedFromPart Then
+               EgtSetInfo(nRibId, MAC_RIBSTYPE, m_SelValue.Id)
+            Else
+               EgtRemoveInfo(nRibId, MAC_RIBSTYPE)
+            End If
+      End Select
+   End Sub
+
+   Friend Overrides Sub SaveParam()
+      m_OrigSelValue = m_SelValue
+   End Sub
+
+   Friend Overrides Sub ResetParam()
+      m_SelValue = m_OrigSelValue
+   End Sub
+
+#Region "COMMANDS"
+
+#Region "ResetParam"
+
+   Public ReadOnly Property ResetParam_Command As ICommand
+      Get
+         If m_cmdResetParam Is Nothing Then
+            m_cmdResetParam = New Command(AddressOf ResetParamCmd)
+         End If
+         Return m_cmdResetParam
+      End Get
+   End Property
+
+   Public Sub ResetParamCmd()
+      m_SelValue = m_PartSelValue
+      NotifyPropertyChanged(NameOf(SelValue))
+      NotifyPropertyChanged(NameOf(bIsModifiedFromPart))
+   End Sub
+
+#End Region    ' ResetParam
+
+#End Region    ' COMMANDS
+
+
+End Class
+
+Public Class RibCheckMachiningParam
+   Inherits CheckMachiningParam
+
+   Public Overrides Property bValue As Boolean
+      Get
+         Return m_bValue
+      End Get
+      Set(value As Boolean)
+         m_bValue = value
+         NotifyPropertyChanged(NameOf(bValue))
+         NotifyPropertyChanged(NameOf(bIsModifiedFromPart))
+      End Set
+   End Property
+
+   Protected m_bPartValue As String
+   Public ReadOnly Property bPartValue As String
+      Get
+         Return m_bPartValue
+      End Get
+   End Property
+
+   Public ReadOnly Property bIsModifiedFromPart As Boolean
+      Get
+         Return m_bValue <> m_bPartValue
+      End Get
+   End Property
+
+   ' Definizione comandi
+   Private m_cmdResetParam As ICommand
+
+   Sub New(Type As Params, nRibId As Integer, nPartId As Integer)
+      MyBase.New(Type)
+      Dim bReadFromPart As Boolean = False
+      Select Case Type
+         'Case Params.RIBSLINK
+         '   bReadFromPart = EgtGetInfo(nRibId, MAC_RIBSLINK, m_bValue)
+         '   EgtGetInfo(nPartId, MAC_RIBSOVERLAP, m_bPartValue)
+         Case Params.RIBSINVERTDIRECTION
+            bReadFromPart = EgtGetInfo(nRibId, MAC_RIBSINVERTDIRECTION, m_bValue)
+            EgtGetInfo(nPartId, MAC_RIBSINVERTDIRECTION, m_bPartValue)
+         Case Params.RIBSLEADININVERT
+            bReadFromPart = EgtGetInfo(nRibId, MAC_RIBSLEADININVERT, m_bValue)
+            EgtGetInfo(nPartId, MAC_RIBSLEADININVERT, m_bPartValue)
+         Case Params.RIBSLEADOUTINVERT
+            bReadFromPart = EgtGetInfo(nRibId, MAC_RIBSLEADOUTINVERT, m_bValue)
+            EgtGetInfo(nPartId, MAC_RIBSLEADOUTINVERT, m_bPartValue)
+      End Select
+      m_bOrigValue = m_bValue
+      If Not bReadFromPart Then
+         m_bValue = m_bPartValue
+         m_bOrigValue = m_bPartValue
+      End If
+   End Sub
+
+   Friend Sub WriteParamInRib(nRibId As Integer)
+      Select Case Type
+         'Case Params.RIBSLINK
+         '   If bIsModifiedFromPart Then
+         '      EgtSetInfo(nRibId, MAC_RIBSLINK, If(m_bValue, 1, 0))
+         '   Else
+         '      EgtRemoveInfo(nRibId, MAC_RIBSLINK)
+         '   End If
+         Case Params.RIBSINVERTDIRECTION
+            If bIsModifiedFromPart Then
+               EgtSetInfo(nRibId, MAC_RIBSINVERTDIRECTION, If(m_bValue, 1, 0))
+            Else
+               EgtRemoveInfo(nRibId, MAC_RIBSINVERTDIRECTION)
+            End If
+         Case Params.RIBSLEADININVERT
+            If bIsModifiedFromPart Then
+               EgtSetInfo(nRibId, MAC_RIBSLEADININVERT, If(m_bValue, 1, 0))
+            Else
+               EgtRemoveInfo(nRibId, MAC_RIBSLEADININVERT)
+            End If
+         Case Params.RIBSLEADOUTINVERT
+            If bIsModifiedFromPart Then
+               EgtSetInfo(nRibId, MAC_RIBSLEADOUTINVERT, If(m_bValue, 1, 0))
+            Else
+               EgtRemoveInfo(nRibId, MAC_RIBSLEADOUTINVERT)
+            End If
+      End Select
+   End Sub
+
+   Friend Overrides Sub SaveParam()
+      m_bOrigValue = m_bValue
+   End Sub
+
+   Friend Overrides Sub ResetParam()
+      m_bValue = m_bOrigValue
+      NotifyPropertyChanged(NameOf(bValue))
+   End Sub
+
+#Region "COMMANDS"
+
+#Region "ResetParam"
+
+   Public ReadOnly Property ResetParam_Command As ICommand
+      Get
+         If m_cmdResetParam Is Nothing Then
+            m_cmdResetParam = New Command(AddressOf ResetParamCmd)
+         End If
+         Return m_cmdResetParam
+      End Get
+   End Property
+
+   Public Sub ResetParamCmd()
+      m_bValue = m_bPartValue
+      NotifyPropertyChanged(NameOf(bValue))
+      NotifyPropertyChanged(NameOf(bIsModifiedFromPart))
+   End Sub
+
+#End Region    ' ResetParam
+
+#End Region    ' COMMANDS
+
+
 End Class