diff --git a/Drilling.cpp b/Drilling.cpp
index 0cf476d..d65cd58 100644
--- a/Drilling.cpp
+++ b/Drilling.cpp
@@ -2779,8 +2779,8 @@ Drilling::GenerateHoleCl( int nInd, const SelData& nCircId, const string& sPName
   // assegno l'elevazione massima
    m_pGeomDB->SetInfo( nPathId, KEY_ELEV, hole.dLen) ;
   // foro normale
-   if ( m_Params.m_dStep < EPS_SMALL  ||
-        m_Params.m_dStep > hole.dLen - EPS_SMALL) {
+   if ( ( m_Params.m_dStep < EPS_SMALL  ||  m_Params.m_dStep > hole.dLen - 10 * EPS_SMALL)  &&
+        GetDoubleLastStep() > hole.dLen - 10 * EPS_SMALL) {
       if ( DoStandardDrilling( hole, nCircId, nPathId, dMHOff, vtA, currToolData)) {
         // aggiorno numero forature
          ++ m_nDrillings ;
@@ -3572,25 +3572,20 @@ Drilling::DoPeckDrilling( const Hole& hole, SelData Id, int nPathId, double dMHO
       if ( AddRapidMove( ptP2, bSplitArcs) == GDB_ID_NULL)
          return false ;
    }
-  // determino se foro in doppio
-   bool bDouble = false ;
-   {  int nDouble = 0 ;
-      if ( GetValInNotes( m_Params.m_sUserNotes, UN_DOUBLE, nDouble)  &&
-           ( nDouble == 1  ||  nDouble == 2  ||  nDouble == 3))
-         bDouble = true ;
-   }
-
+  // parametri per foro in doppio
+   bool bDouble = ( GetDoubleType( m_Params.m_sUserNotes) != 0)  ;
+   double dDoubleLastStep = GetDoubleLastStep() ;
   // ciclo di affondamento a step
    const double MIN_STEP = 1 ;
    const double APPR_STEP = 1 ;
    const double MIN_MOVE = 1 ;
    double dOrigStep = max( m_Params.m_dStep, MIN_STEP) ;
-   double dSteppedLen = ( bDouble ? hole.dLen - dOrigStep : hole.dLen) ;
+   double dSteppedLen = ( bDouble ? hole.dLen - dDoubleLastStep : hole.dLen) ;
    int nStep = int( ceil( dSteppedLen / dOrigStep)) ;
    double dStep = dSteppedLen / nStep ;
    if ( bDouble)
       ++ nStep ;
-   double dLastStep = ( bDouble ? dOrigStep : dStep) ;
+   double dLastStep = ( bDouble ? dDoubleLastStep : dStep) ;
    if ( dReturnPos < - dStep + APPR_STEP + MIN_MOVE)
       dReturnPos = - dStep + APPR_STEP + MIN_MOVE ;
    double dCurrLen = 0 ;
@@ -3723,6 +3718,22 @@ Drilling::DoPeckDrilling( const Hole& hole, SelData Id, int nPathId, double dMHO
    return true ;
 }
 
+//----------------------------------------------------------------------------
+double
+Drilling::GetDoubleLastStep( void)
+{
+  // se non è foratura in doppio, restituisco valore molto grande
+   const double FALSE_LASTSTEP = 10000 ;
+   if ( GetDoubleType( m_Params.m_sUserNotes) == 0) 
+      return FALSE_LASTSTEP ;
+  // recupero valore
+   const double MIN_LASTSTEP = 15 ;
+   double dDoubleLastStep = m_Params.m_dStep ;
+   if ( GetValInNotes( m_Params.m_sUserNotes, UN_LASTSTEP, dDoubleLastStep))
+      dDoubleLastStep = max( dDoubleLastStep, MIN_LASTSTEP)  ;
+   return dDoubleLastStep ;
+}
+
 //----------------------------------------------------------------------------
 // Debug Functions
 //----------------------------------------------------------------------------
diff --git a/Drilling.h b/Drilling.h
index 822f5ab..9ba2ac6 100644
--- a/Drilling.h
+++ b/Drilling.h
@@ -128,6 +128,7 @@ class Drilling : public Machining
       bool MultiHeadOrderConfig( TABMHDRILL& tabDrills, const VECTORHOLE& vHoles, const Vector3d& vtTool, const Vector3d& vtAux) ;
       bool MultiHeadHoleToolsConfig( const VECTORHOLE& vHoles, int nConfig, INTINTVECTOR& vConfMask) ;
       int  VerifyMultiParallelDrills( void) ;
+      double GetDoubleLastStep( void) ;
 
     /* debug functions */
      void PrintConfigs( const VECTORHOLE& vHoles) ;
diff --git a/EgtMachKernel.rc b/EgtMachKernel.rc
index dc42c73..7773a2b 100644
Binary files a/EgtMachKernel.rc and b/EgtMachKernel.rc differ
diff --git a/OperUserNotesConst.h b/OperUserNotesConst.h
index a86b5af..28b8239 100644
--- a/OperUserNotesConst.h
+++ b/OperUserNotesConst.h
@@ -26,6 +26,9 @@ static const std::string UN_DOUBLE = "DOUBLE" ;
 static const std::string UN_MIRRORAX = "MirrorAx" ;
 static const std::string UN_DELTAZ = "DeltaZ" ;
 
+// Solo per Drilling
+static const std::string UN_LASTSTEP = "LastStep" ;
+
 // Solo per FiveAxisMilling
 static const std::string UN_SINGCONEANG = "SingConeAng" ;