diff --git a/LuaLibs/CalcToolPath.lua b/LuaLibs/CalcToolPath.lua
index 697235b..ab5e900 100644
--- a/LuaLibs/CalcToolPath.lua
+++ b/LuaLibs/CalcToolPath.lua
@@ -2097,7 +2097,7 @@ local function SpiralVase( vLayIds, LayerParams)
                      local nGuideId = EgtCopyGlob( nOldPathId, nTpathGrpId)
                      -- la porto alla stessa quota del toolpath
                      EgtMove( nGuideId, vtMove + LayerParams.dLayHeight * LayerParams.vtSlicing, GDB_RT.GLOB)
-                     EgtChangeClosedCurveStartPoint( nGuideId, ptOld, GDB_RT.GLOB)
+                     EgtChangeClosedCurveStartPoint( nGuideId, ptNew, GDB_RT.GLOB)
                      
                      EgtSpiralizeCurveAlongGuide( nNewEntId, nGuideId)
                      EgtErase( nGuideId)
diff --git a/LuaLibs/RunCalcSolids.lua b/LuaLibs/RunCalcSolids.lua
index 38ca633..f27f016 100644
--- a/LuaLibs/RunCalcSolids.lua
+++ b/LuaLibs/RunCalcSolids.lua
@@ -112,6 +112,10 @@ local function CreateSpiralVaseSolid( nCrvId, nSolidGrp, LayerParams, dStrand)
    -- gruppo temporaneo per conti 
    local nGrpTmp = EgtGroup( nSolidGrp, Frame3d( ORIG(), LayerParams.vtSlicing, GDB_RT.GLOB))
    
+   -- accorcio leggermente la curva per evitare problemi di inconsistent orientation nel solido
+   local dLen = EgtCurveLength( nCrvId)
+   EgtTrimCurveEndAtLen( nCrvId, dLen - 20 * GEO.EPS_SMALL)
+   
    local ptS = EgtSP( nCrvId, GDB_ID.ROOT)
    local vtS = EgtSV( nCrvId, GDB_ID.ROOT)
    local ptE = EgtEP( nCrvId, GDB_ID.ROOT)