diff --git a/CalcPocketing.cpp b/CalcPocketing.cpp
index cb9e8f5..93bece0 100644
--- a/CalcPocketing.cpp
+++ b/CalcPocketing.cpp
@@ -6236,9 +6236,6 @@ AddEpicycles( const PocketParams& PockParam, ICurveComposite* pCompo, ICurveComp
    if ( pCompo == nullptr  ||  ! pCompo->IsValid())
       return false ;
 
-   if ( PockParam.bInvert)
-      pCompo->Invert() ;    // oriento la curva in senso antiorario
-
   // calcolo l'Offset definito dal valore dell'raggio dell'epiciclo
    OffsetCurve OffsCrv ;
    if ( ! OffsCrv.Make( pCompo, PockParam.dEpicyclesRad, ICurve::OFF_FILLET)  ||  OffsCrv.GetCurveCount() > 1)
@@ -6544,7 +6541,7 @@ CalcSpiral( const ISurfFlatRegion* pSfrPock, const ISurfFlatRegion* pSfrOrig, co
       }
      // se non ho Chunks e devo usare un Offset più piccolo...
       else if ( ! bSmallRad) {
-         if ( PockParams.dRad < EPS_SMALL)
+         if ( PockParams.dRad < EPS_SMALL  ||  PockParams.bPolishing)
             break ;
          dOffs = dOffsPrec + ( nIter == 0 ? PockParams.dRad + PockParams.dRadialOffset : PockParams.dRad) ;
       }