diff --git a/EXE_NstAutoNesting.cpp b/EXE_NstAutoNesting.cpp
index 3a9ab4c..81db9f2 100644
--- a/EXE_NstAutoNesting.cpp
+++ b/EXE_NstAutoNesting.cpp
@@ -48,6 +48,43 @@ ExeAutoNestStart( void)
    return s_pAutoNester->Start() ;   
 }
 
+//-----------------------------------------------------------------------------
+static bool
+MyGetOutline( IGeomDB* pGeomDB, int nOutlineId, PolyArc& Outline)
+{
+  // recupero riferimento dell'Outline
+   Frame3d frOutl ;
+   if ( ! pGeomDB->GetGlobFrame( nOutlineId, frOutl))
+      return false ;
+  // recupero il tipo di oggetto
+   int nType = pGeomDB->GetGeoType( nOutlineId) ;
+  // recupero la curva di contorno
+   if ( ( nType & GEO_CURVE) != 0) {
+      const ICurve* pCrv = GetCurve( pGeomDB->GetGeoObj( nOutlineId)) ;
+      if ( pCrv == nullptr  ||  ! pCrv->ApproxWithArcs( LIN_TOL_FINE, ANG_TOL_STD_DEG, Outline))
+         return false ;
+   }
+   else if ( nType == SRF_FLATRGN) {
+      const ISurfFlatRegion* pSfr = GetSurfFlatRegion( pGeomDB->GetGeoObj( nOutlineId)) ;
+      if ( pSfr == nullptr)
+         return false ;
+      PtrOwner<ICurve> pCrv( pSfr->GetLoop( 0, 0)) ;
+      if ( IsNull( pCrv)  ||  ! pCrv->ApproxWithArcs( LIN_TOL_FINE, ANG_TOL_STD_DEG, Outline))
+         return false ;
+   }
+  // la porto in globale
+   Outline.ToGlob( frOutl) ;
+  // verifico direzione di estrusione
+   Vector3d vtExtr = Outline.GetExtrusion() ;
+   if ( vtExtr.IsZplus())
+      ;
+   else if ( vtExtr.IsZminus())
+      Outline.Mirror( ORIG, Z_AX) ;
+   else
+      return false ;
+   return true ;
+}
+
 //-----------------------------------------------------------------------------
 bool
 ExeAutoNestAddSheet( int nSheetId, int nOutlineId, double dKerf, int nPriority, int nCount)
@@ -56,101 +93,33 @@ ExeAutoNestAddSheet( int nSheetId, int nOutlineId, double dKerf, int nPriority,
       return false ;
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, false)
-  // recupero riferimento dell'Outline
-   Frame3d frOutl ;
-   if ( ! pGeomDB->GetGlobFrame( nOutlineId, frOutl))
-      return false ;
-  // recupero il tipo di oggetto
-   int nType = pGeomDB->GetGeoType( nOutlineId) ;
+  // recupero il contorno
    PolyArc Outline ;
-  // recupero la curva di contorno
-   if ( ( nType & GEO_CURVE) != 0) {
-      const ICurve* pCrv = GetCurve( pGeomDB->GetGeoObj( nOutlineId)) ;
-      if ( pCrv == nullptr  ||  ! pCrv->ApproxWithArcs( LIN_TOL_FINE, ANG_TOL_STD_DEG, Outline))
-         return false ;
-   }
-   else if ( nType == SRF_FLATRGN) {
-      const ISurfFlatRegion* pSfr = GetSurfFlatRegion( pGeomDB->GetGeoObj( nOutlineId)) ;
-      if ( pSfr == nullptr)
-         return false ;
-      PtrOwner<ICurve> pCrv( pSfr->GetLoop( 0, 0)) ;
-      if ( IsNull( pCrv)  ||  ! pCrv->ApproxWithArcs( LIN_TOL_FINE, ANG_TOL_STD_DEG, Outline))
-         return false ;
-   }
-  // la porto in globale
-   Outline.ToGlob( frOutl) ;
-  // verifico direzione di estrusione
-   Vector3d vtExtr = Outline.GetExtrusion() ;
-   if ( vtExtr.IsZplus())
-      ;
-   else if ( vtExtr.IsZminus())
-      Outline.Mirror( ORIG, Z_AX) ;
-   else
+   if ( ! MyGetOutline( pGeomDB, nOutlineId, Outline))
       return false ;
-  // se richiesto kerf ( sempre nullo o positivo)
-   if ( dKerf > 10 * EPS_SMALL) {
-     // curva di contorno
-      PtrOwner<ICurveComposite> pCompo( CreateCurveComposite()) ;
-      if ( IsNull( pCompo)  ||  ! pCompo->FromPolyArc( Outline))
-         return false ;
-     // verifico sia CCW
-      double dArea ; pCompo->GetAreaXY( dArea) ;
-      if ( dArea < 0)
-         pCompo->Invert() ;
-     // eseguo offset
-      OffsetCurve OffsCrv ;
-      if ( ! OffsCrv.Make( pCompo, - dKerf, ICurve::OFF_FILLET))
-         return false ;
-      PtrOwner<ICurve> pOffs( OffsCrv.GetLongerCurve()) ;
-     // riassegno a PolyArc
-      if ( IsNull( pOffs)  ||  ! pOffs->ApproxWithArcs( LIN_TOL_FINE, ANG_TOL_STD_DEG, Outline))
-         return false ;
-   }  
   // aggiungo il pannello
-   return s_pAutoNester->AddSheet( nSheetId, Outline, nPriority, nCount) ;
+   return s_pAutoNester->AddSheet( nSheetId, Outline, dKerf, nPriority, nCount) ;
 }
 
 //-----------------------------------------------------------------------------
 bool
-ExeAutoNestAddPart( int nPartId, int nOutlineId, bool bCanFlip, bool bCanRotate, int nPriority, int nCount)
+ExeAutoNestAddPart( int nPartId, int nOutlineId, int nToolOutlineId,
+                    bool bCanFlip, bool bCanRotate, double dRotStep, int nPriority, int nCount)
 {
    if ( IsNull( s_pAutoNester))
       return false ;
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, false)
-  // recupero riferimento dell'Outline
-   Frame3d frOutl ;
-   if ( ! pGeomDB->GetGlobFrame( nOutlineId, frOutl))
-      return false ;
-  // recupero il tipo di oggetto
-   int nType = pGeomDB->GetGeoType( nOutlineId) ;
+  // recupero il contorno
    PolyArc Outline ;
-  // recupero la curva di contorno
-   if ( ( nType & GEO_CURVE) != 0) {
-      const ICurve* pCrv = GetCurve( pGeomDB->GetGeoObj( nOutlineId)) ;
-      if ( pCrv == nullptr  ||  ! pCrv->ApproxWithArcs( LIN_TOL_FINE, ANG_TOL_STD_DEG, Outline))
-         return false ;
-   }
-   else if ( nType == SRF_FLATRGN) {
-      const ISurfFlatRegion* pSfr = GetSurfFlatRegion( pGeomDB->GetGeoObj( nOutlineId)) ;
-      if ( pSfr == nullptr)
-         return false ;
-      PtrOwner<ICurve> pCrv( pSfr->GetLoop( 0, 0)) ;
-      if ( IsNull( pCrv)  ||  ! pCrv->ApproxWithArcs( LIN_TOL_FINE, ANG_TOL_STD_DEG, Outline))
-         return false ;
-   }
-  // la porto in globale
-   Outline.ToGlob( frOutl) ;
-  // verifico direzione di estrusione
-   Vector3d vtExtr = Outline.GetExtrusion() ;
-   if ( vtExtr.IsZplus())
-      ;
-   else if ( vtExtr.IsZminus())
-      Outline.Mirror( ORIG, Z_AX) ;
-   else
+   if ( ! MyGetOutline( pGeomDB, nOutlineId, Outline))
+      return false ;
+  // recupero evntuale contorno della lavorazione
+   PolyArc ToolOutline ;
+   if ( nToolOutlineId != GDB_ID_NULL  &&   ! MyGetOutline( pGeomDB, nToolOutlineId, ToolOutline))
       return false ;
   // aggiungo il pezzo
-   if ( ! s_pAutoNester->AddPart( nPartId, Outline, bCanFlip, bCanRotate, nPriority, nCount))
+   if ( ! s_pAutoNester->AddPart( nPartId, Outline, ToolOutline, bCanFlip, bCanRotate, dRotStep, nPriority, nCount))
       return false ;
   // incremento contatore pezzi
    s_nTotParts += nCount ;
diff --git a/LUA_Nesting.cpp b/LUA_Nesting.cpp
index 5ec0647..12ca828 100644
--- a/LUA_Nesting.cpp
+++ b/LUA_Nesting.cpp
@@ -131,22 +131,26 @@ LuaAutoNestAddSheet( lua_State* L)
 static int
 LuaAutoNestAddPart( lua_State* L)
 {
-  // 6 parametri : nPartId, nOutlineId, bCanFlip, bCanRotate, nPriority, nCount
+  // 7 parametri : nPartId, nOutlineId, nToolOutlineId, bCanFlip, bCanRotate, dRotStep, nPriority, nCount
    int nPartId ;
    LuaCheckParam( L, 1, nPartId)
    int nOutlineId ;
    LuaCheckParam( L, 2, nOutlineId)
+   int nToolOutlineId ;
+   LuaCheckParam( L, 3, nToolOutlineId)
    bool bCanFlip ;
-   LuaCheckParam( L, 3, bCanFlip)
+   LuaCheckParam( L, 4, bCanFlip)
    bool bCanRotate ;
-   LuaCheckParam( L, 4, bCanRotate)
+   LuaCheckParam( L, 5, bCanRotate)
+   double dRotStep ; 
+   LuaCheckParam( L, 6, dRotStep)
    int nPriority ;
-   LuaCheckParam( L, 5, nPriority)
+   LuaCheckParam( L, 7, nPriority)
    int nCount ;
-   LuaCheckParam( L, 6, nCount)
+   LuaCheckParam( L, 8, nCount)
    LuaClearStack( L) ;
   // aggiungo un pezzo al nesting corrente
-   bool bOk = ExeAutoNestAddPart( nPartId, nOutlineId, bCanFlip, bCanRotate, nPriority, nCount) ;
+   bool bOk = ExeAutoNestAddPart( nPartId, nOutlineId, nToolOutlineId, bCanFlip, bCanRotate, dRotStep, nPriority, nCount) ;
   // restituisco il risultato
    LuaSetParam( L, bOk) ;
    return 1 ;