diff --git a/LuaLibs/ProcessCut.lua b/LuaLibs/ProcessCut.lua
index df70d66..d34c9eb 100644
--- a/LuaLibs/ProcessCut.lua
+++ b/LuaLibs/ProcessCut.lua
@@ -542,7 +542,11 @@ local function MakeFromTop( sCutting, Proc, nPhase, nRawId, nPartId, dOvmHead, b
                      local dVzLimDwnUp = dNzLimDwnUp
                      if j ~= 1 then
                         vtNewOrthoO = -vtOrthoO
-                        if not BD.C_SIMM and not BD.TURN and abs( vtN:getY()) > 0.05 then dVzLimDwnUp = -0.708 end
+                        if BD.GetNzLimDownUp then
+                           dVzLimDwnUp = BD.GetNzLimDownUp( b3Raw, vtN, V_NULL(), true)
+                        elseif not BD.C_SIMM and not BD.TURN and abs( vtN:getY()) > 0.05 then
+                           dVzLimDwnUp = -0.708
+                        end
                      end
                      local bOk, sErr = Fbs.MakeOne( vCuts[i][j], 0, sCutting, dSawDiam, vtNewOrthoO, dVzLimDwnUp, BD.CUT_EXTRA, BD.CUT_SIC, 0, 0, 0, nil, b3Raw)
                      if not bOk then return bOk, sErr end
@@ -566,7 +570,11 @@ local function MakeFromTop( sCutting, Proc, nPhase, nRawId, nPartId, dOvmHead, b
                      end
                   end
                   local dVzLimDwnUp = dNzLimDwnUp
-                  if not BD.C_SIMM and not BD.TURN and vtN:getZ() > 0.707 then dVzLimDwnUp = -0.708 end
+                  if BD.GetNzLimDownUp then
+                     dVzLimDwnUp = BD.GetNzLimDownUp( b3Raw, vtN, V_NULL(), true)
+                  elseif not BD.C_SIMM and not BD.TURN and vtN:getZ() > 0.707 then
+                     dVzLimDwnUp = -0.708
+                  end
                   local bOk, sErr = Fbs.MakeOne( vCuts[i][j], 0, sCutting, dSawDiam, vtOrthoO, dVzLimDwnUp, dExtraCut, BD.CUT_SIC, 0, 0, 0, sNotes, b3Raw)
                   if not bOk then return bOk, sErr end
                end