diff --git a/EXE_GdbModifyCurve.cpp b/EXE_GdbModifyCurve.cpp
index 302f7d0..ee24c05 100644
--- a/EXE_GdbModifyCurve.cpp
+++ b/EXE_GdbModifyCurve.cpp
@@ -2349,12 +2349,12 @@ MyProjectCurveOnSurf( int nCurveId, int nSurfTmId, const Vector3d& vtProj, int n
       return false ;
    Vector3d vtProjL = GetVectorLocal( pGeomDB, vtProj, nRefType, frCrv) ;
    vtProjL.LocToLoc( frCrv, frStm) ;
+  // vanno affilati gli spigoli solo se direzione non da proiezione
+   bool bSharpEdges = ( ! bDirFromProj) ;
   // eseguo la proiezione
    PNT5AXVECTOR vPt5ax ;
-   if ( ! ProjectCurveOnSurf( *CrvLoc.Get(), *pSurf, vtProjL, dLinTol, dMaxSegmLen, vPt5ax))
+   if ( ! ProjectCurveOnSurf( *CrvLoc.Get(), *pSurf, vtProjL, dLinTol, dMaxSegmLen, bSharpEdges, vPt5ax))
       return false ;
-  // rimuovo i punti allineati entro la tolleranza e non più lontani tra loro del massimo
-   RemovePointsInExcess( vPt5ax, dLinTol, dMaxSegmLen, ! bDirFromProj) ;
   // inserisco la composita nel gruppo destinazione
    PtrOwner<ICurveComposite> pCompo ;
    for ( const auto& Pt5ax : vPt5ax) {
@@ -2376,7 +2376,7 @@ MyProjectCurveOnSurf( int nCurveId, int nSurfTmId, const Vector3d& vtProj, int n
       PtrOwner<IGeoVector3d> pGeoVct( CreateGeoVector3d()) ;
       if ( IsNull( pGeoVct))
          return false ;
-      Vector3d vtDir = ( bDirFromProj ? Pt5ax.vtDir2 : Pt5ax.vtDir) ;
+      Vector3d vtDir = ( bDirFromProj ? Pt5ax.vtDir2 : Pt5ax.vtDir1) ;
       pGeoVct->Set( 10 * GetLocToLoc( vtDir, frStm, frDest), GetLocToLoc( Pt5ax.ptP, frStm, frDest)) ;
       int nNewId = pGeomDB->AddGeoObj( GDB_ID_NULL, nDestGrpId, Release( pGeoVct)) ;
       if ( nNewId == GDB_ID_NULL)
@@ -2392,7 +2392,7 @@ MyProjectCurveOnSurf( int nCurveId, int nSurfTmId, const Vector3d& vtProj, int n
 //-------------------------------------------------------------------------------
 bool
 ExeProjectCurveOnSurf( int nCurveId, int nSurfTmId, const Vector3d& vtProj, int nDestGrpId,
-                         double dLinTol, double dMaxSegmLen, bool bDirFromProj, int nRefType)
+                       double dLinTol, double dMaxSegmLen, bool bDirFromProj, int nRefType)
 {
    bool bOk = MyProjectCurveOnSurf( nCurveId, nSurfTmId, vtProj, nDestGrpId, dLinTol, dMaxSegmLen, bDirFromProj, nRefType) ;
    ExeSetModified() ;
@@ -2459,6 +2459,8 @@ MyProjectCurveOnSurfExt( int nCurveId, int nSurfTmId, int nGuideId, int nDestGrp
    CurveLocal CrvLoc( pCrv, frCrv, frStm) ;
    if ( CrvLoc.Get() == nullptr)
       return false ;
+  // vanno affilati gli spigoli solo se direzione non da guida
+   bool bSharpEdges = ( ! bDirFromGuide) ;
   // eseguo l'opportuna proiezione dopo aver portato l'entità guida nel riferimento della superficie
    PNT5AXVECTOR vPt5ax ;
    if ( pGdePnt != nullptr) {
@@ -2466,14 +2468,14 @@ MyProjectCurveOnSurfExt( int nCurveId, int nSurfTmId, int nGuideId, int nDestGrp
       if ( pGdeLoc == nullptr)
          return false ;
       pGdeLoc->LocToLoc( frGde, frStm) ;
-      if ( ! ProjectCurveOnSurf( *CrvLoc.Get(), *pStm, *pGdeLoc, dLinTol, dMaxSegmLen, vPt5ax))
+      if ( ! ProjectCurveOnSurf( *CrvLoc.Get(), *pStm, *pGdeLoc, dLinTol, dMaxSegmLen, bSharpEdges, vPt5ax))
          return false ;
    }
    else if ( pGdeCrv != nullptr) {
       CurveLocal GdeLoc( pGdeCrv, frGde, frStm) ;
       if ( GdeLoc.Get() == nullptr)
          return false ;
-      if ( ! ProjectCurveOnSurf( *CrvLoc.Get(), *pStm, *GdeLoc.Get(), dLinTol, dMaxSegmLen, vPt5ax))
+      if ( ! ProjectCurveOnSurf( *CrvLoc.Get(), *pStm, *GdeLoc.Get(), dLinTol, dMaxSegmLen, bSharpEdges, vPt5ax))
          return false ;
    }
    else { // pGdeStm != nullptr
@@ -2481,11 +2483,9 @@ MyProjectCurveOnSurfExt( int nCurveId, int nSurfTmId, int nGuideId, int nDestGrp
       const ISurf* pGdeLoc = GetSurf( GdeLoc.Get()) ;
       if ( pGdeLoc == nullptr)
          return false ;
-      if ( ! ProjectCurveOnSurf( *CrvLoc.Get(), *pStm, *pGdeLoc, dLinTol, dMaxSegmLen, vPt5ax))
+      if ( ! ProjectCurveOnSurf( *CrvLoc.Get(), *pStm, *pGdeLoc, dLinTol, dMaxSegmLen, bSharpEdges, vPt5ax))
          return false ;
    }
-  // rimuovo i punti allineati entro la tolleranza e non più lontani tra loro del massimo
-   RemovePointsInExcess( vPt5ax, dLinTol, dMaxSegmLen, ! bDirFromGuide) ;
   // inserisco la composita nel gruppo destinazione
    PtrOwner<ICurveComposite> pCompo ;
    for ( const auto& Pt5ax : vPt5ax) {
@@ -2507,7 +2507,7 @@ MyProjectCurveOnSurfExt( int nCurveId, int nSurfTmId, int nGuideId, int nDestGrp
       PtrOwner<IGeoVector3d> pGeoVct( CreateGeoVector3d()) ;
       if ( IsNull( pGeoVct))
          return false ;
-      Vector3d vtDir = ( bDirFromGuide ? Pt5ax.vtDir2 : Pt5ax.vtDir) ;
+      Vector3d vtDir = ( bDirFromGuide ? Pt5ax.vtDir2 : Pt5ax.vtDir1) ;
       pGeoVct->Set( 10 * GetLocToLoc( vtDir, frStm, frDest), GetLocToLoc( Pt5ax.ptP, frStm, frDest)) ;
       int nNewId = pGeomDB->AddGeoObj( GDB_ID_NULL, nDestGrpId, Release( pGeoVct)) ;
       if ( nNewId == GDB_ID_NULL)
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index 46aabcf..16131bc 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ